diff --git a/dhp-workflows/dhp-graph-mapper/pom.xml b/dhp-workflows/dhp-graph-mapper/pom.xml
index 687f0de667..f579a7d2bf 100644
--- a/dhp-workflows/dhp-graph-mapper/pom.xml
+++ b/dhp-workflows/dhp-graph-mapper/pom.xml
@@ -57,6 +57,11 @@
             <artifactId>commons-io</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>commons-validator</groupId>
+            <artifactId>commons-validator</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>org.apache.spark</groupId>
             <artifactId>spark-core_2.11</artifactId>
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java
index 5cfb22cb91..a8d09e4a7f 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java
@@ -10,9 +10,13 @@ import static eu.dnetlib.dhp.schema.common.ModelConstants.RESULT_PROJECT;
 import static eu.dnetlib.dhp.schema.common.ModelConstants.UNKNOWN;
 import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.*;
 
+import java.net.MalformedURLException;
+import java.net.URL;
 import java.util.*;
+import java.util.stream.Collectors;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.validator.routines.UrlValidator;
 import org.dom4j.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -617,4 +621,15 @@ public abstract class AbstractMdRecordToOafMapper {
 		return res;
 	}
 
+	protected Set<String> validateUrl(Collection<String> url) {
+		UrlValidator urlValidator = UrlValidator.getInstance();
+		if (Objects.isNull(url)) {
+			return new HashSet<>();
+		}
+		return url
+			.stream()
+			.filter(u -> urlValidator.isValid(u))
+			.collect(Collectors.toCollection(HashSet::new));
+	}
+
 }
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OafToOafMapper.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OafToOafMapper.java
index 9225e174d3..30f3935f5f 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OafToOafMapper.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OafToOafMapper.java
@@ -159,22 +159,25 @@ public class OafToOafMapper extends AbstractMdRecordToOafMapper {
 			.setProcessingchargecurrency(field(doc.valueOf("//oaf:processingchargeamount/@currency"), info));
 
 		final List<Node> nodes = Lists.newArrayList(doc.selectNodes("//dc:identifier"));
-		instance
-			.setUrl(
-				nodes
-					.stream()
-					.filter(n -> StringUtils.isNotBlank(n.getText()))
-					.map(n -> n.getText().trim())
-					.filter(u -> u.startsWith("http"))
-					.map(s -> {
-						try {
-							return URLDecoder.decode(s, "UTF-8");
-						} catch (Throwable t) {
-							return s;
-						}
-					})
-					.distinct()
-					.collect(Collectors.toCollection(ArrayList::new)));
+		final List<String> url = nodes
+			.stream()
+			.filter(n -> StringUtils.isNotBlank(n.getText()))
+			.map(n -> n.getText().trim())
+			.filter(u -> u.startsWith("http"))
+			.map(s -> {
+				try {
+					return URLDecoder.decode(s, "UTF-8");
+				} catch (Throwable t) {
+					return s;
+				}
+			})
+			.distinct()
+			.collect(Collectors.toCollection(ArrayList::new));
+		final Set<String> validUrl = validateUrl(url);
+		if (!validUrl.isEmpty()) {
+			instance.setUrl(new ArrayList<>());
+			instance.getUrl().addAll(validUrl);
+		}
 
 		return Lists.newArrayList(instance);
 	}
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OdfToOafMapper.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OdfToOafMapper.java
index d6bfe67142..5781988e62 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OdfToOafMapper.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/OdfToOafMapper.java
@@ -6,11 +6,14 @@ import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.*;
 import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.structuredProperty;
 
 import java.io.UnsupportedEncodingException;
+import java.net.MalformedURLException;
+import java.net.URL;
 import java.net.URLDecoder;
 import java.util.*;
 import java.util.stream.Collectors;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.validator.routines.UrlValidator;
 import org.dom4j.Document;
 import org.dom4j.Element;
 import org.dom4j.Node;
@@ -171,23 +174,31 @@ public class OdfToOafMapper extends AbstractMdRecordToOafMapper {
 		for (final Object o : doc.selectNodes("//*[local-name()='identifier' and ./@identifierType='landingPage']")) {
 			url.add(trimAndDecodeUrl(((Node) o).getText().trim()));
 		}
-		for (final Object o : doc
-			.selectNodes("//*[local-name()='alternateIdentifier' and ./@alternateIdentifierType='DOI']")) {
-			url.add(HTTP_DOI_PREIFX + ((Node) o).getText().trim());
+
+		Set<String> validUrl = validateUrl(url);
+
+		if (validUrl.stream().noneMatch(s -> s.contains("doi.org"))) {
+			for (final Object o : doc
+				.selectNodes("//*[local-name()='alternateIdentifier' and ./@alternateIdentifierType='DOI']")) {
+				validUrl.add(HTTP_DOI_PREIFX + ((Node) o).getText().trim());
+			}
+			for (final Object o : doc.selectNodes("//*[local-name()='identifier' and ./@identifierType='DOI']")) {
+				validUrl.add(HTTP_DOI_PREIFX + ((Node) o).getText().trim());
+			}
 		}
-		for (final Object o : doc.selectNodes("//*[local-name()='identifier' and ./@identifierType='DOI']")) {
-			url.add(HTTP_DOI_PREIFX + ((Node) o).getText().trim());
+		if (validUrl.stream().noneMatch(s -> s.contains("hdl.handle.net"))) {
+			for (final Object o : doc
+				.selectNodes("//*[local-name()='alternateIdentifier' and ./@alternateIdentifierType='Handle']")) {
+				validUrl.add(HTTP_HANDLE_PREIFX + ((Node) o).getText().trim());
+			}
+			for (final Object o : doc.selectNodes("//*[local-name()='identifier' and ./@identifierType='Handle']")) {
+				validUrl.add(HTTP_HANDLE_PREIFX + ((Node) o).getText().trim());
+			}
 		}
-		for (final Object o : doc
-			.selectNodes("//*[local-name()='alternateIdentifier' and ./@alternateIdentifierType='Handle']")) {
-			url.add(HTTP_HANDLE_PREIFX + ((Node) o).getText().trim());
-		}
-		for (final Object o : doc.selectNodes("//*[local-name()='identifier' and ./@identifierType='Handle']")) {
-			url.add(HTTP_HANDLE_PREIFX + ((Node) o).getText().trim());
-		}
-		if (!url.isEmpty()) {
+
+		if (!validUrl.isEmpty()) {
 			instance.setUrl(new ArrayList<>());
-			instance.getUrl().addAll(url);
+			instance.getUrl().addAll(validUrl);
 		}
 		return Arrays.asList(instance);
 	}
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java
index 231d5b0ac4..64b68e6af1 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java
+++ b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java
@@ -950,7 +950,7 @@ class MappersTest {
 	@Test
 	void testNotWellFormed() throws IOException {
 		final String xml = IOUtils
-				.toString(Objects.requireNonNull(getClass().getResourceAsStream("oaf_notwellformed.xml")));
+			.toString(Objects.requireNonNull(getClass().getResourceAsStream("oaf_notwellformed.xml")));
 		final List<Oaf> actual = new OafToOafMapper(vocs, false, true).processMdRecord(xml);
 		assertNotNull(actual);
 		assertTrue(actual.isEmpty());
diff --git a/pom.xml b/pom.xml
index ab59e7be3d..a1b26966e1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -200,6 +200,12 @@
 				<version>${dhp.commons.lang.version}</version>
 			</dependency>
 
+			<dependency>
+				<groupId>commons-validator</groupId>
+				<artifactId>commons-validator</artifactId>
+				<version>1.7</version>
+			</dependency>
+
 			<dependency>
 				<groupId>com.github.sisyphsu</groupId>
 				<artifactId>dateparser</artifactId>