diff --git a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/model/ProvisionModelSupport.java b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/model/ProvisionModelSupport.java
index a8c9ceeb3..b450b95be 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/model/ProvisionModelSupport.java
+++ b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/model/ProvisionModelSupport.java
@@ -5,6 +5,7 @@ import java.io.StringReader;
 import java.util.*;
 import java.util.stream.Collectors;
 
+import eu.dnetlib.dhp.schema.solr.ExternalReference;
 import org.apache.commons.lang3.StringUtils;
 import org.dom4j.Document;
 import org.dom4j.DocumentException;
@@ -375,7 +376,7 @@ public class ProvisionModelSupport {
 		rs.setIsInDiamondJournal(r.getIsInDiamondJournal());
 		rs.setPubliclyFunded(r.getPubliclyFunded());
 		rs.setTransformativeAgreement(r.getTransformativeAgreement());
-
+		rs.setExternalReference(mapExternalReference(r.getExternalReference()));
 		rs.setInstance(mapInstances(r.getInstance()));
 
 		if (r instanceof Publication) {
@@ -561,6 +562,21 @@ public class ProvisionModelSupport {
 			.orElse(null);
 	}
 
+	private static List<ExternalReference> mapExternalReference(List<eu.dnetlib.dhp.schema.oaf.ExternalReference> externalReference) {
+		return Optional.ofNullable(externalReference)
+				.map(ext -> ext.stream()
+						.map(e -> ExternalReference.newInstance(
+								e.getSitename(),
+								e.getLabel(),
+								e.getAlternateLabel(),
+								e.getUrl(),
+								mapCodeLabel(e.getQualifier()),
+								e.getRefidentifier(),
+								e.getQuery()))
+						.collect(Collectors.toList()))
+				.orElse(Lists.newArrayList());
+	}
+
 	private static List<Context> asContext(List<eu.dnetlib.dhp.schema.oaf.Context> ctxList,
 		ContextMapper contextMapper) {
 
@@ -579,7 +595,7 @@ public class ProvisionModelSupport {
 		}
 
 		return Optional
-			.ofNullable(contexts)
+			.of(contexts)
 			.map(
 				ctx -> ctx
 					.stream()
diff --git a/pom.xml b/pom.xml
index 42afbd372..a5bc6cedd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -960,7 +960,7 @@
         <commons.logging.version>1.1.3</commons.logging.version>
         <commons-validator.version>1.7</commons-validator.version>
         <dateparser.version>1.0.7</dateparser.version>
-        <dhp-schemas.version>[6.1.3]</dhp-schemas.version>
+        <dhp-schemas.version>[6.1.4-SNAPSHOT]</dhp-schemas.version>
         <dhp.cdh.version>cdh5.9.2</dhp.cdh.version>
         <dhp.commons.lang.version>3.5</dhp.commons.lang.version>
         <dhp.guava.version>11.0.2</dhp.guava.version>