diff --git a/dmp-backend/core/src/main/java/eu/eudat/model/DmpBlueprint.java b/dmp-backend/core/src/main/java/eu/eudat/model/DmpBlueprint.java
index 53ca6fa82..f9acb6798 100644
--- a/dmp-backend/core/src/main/java/eu/eudat/model/DmpBlueprint.java
+++ b/dmp-backend/core/src/main/java/eu/eudat/model/DmpBlueprint.java
@@ -5,6 +5,7 @@ import eu.eudat.commons.enums.IsActive;
 import eu.eudat.model.dmpblueprintdefinition.Definition;
 
 import java.time.Instant;
+import java.util.List;
 import java.util.UUID;
 
 public class DmpBlueprint {
@@ -33,6 +34,9 @@ public class DmpBlueprint {
     public final static String _hash = "hash";
     private String hash;
 
+    public static final String _dmpExternalReferences = "dmpExternalReferences";
+    private List<DmpExternalReference> dmpExternalReferences;
+
     public UUID getId() {
         return id;
     }
@@ -96,6 +100,14 @@ public class DmpBlueprint {
     public void setDefinition(Definition definition) {
         this.definition = definition;
     }
+
+    public List<DmpExternalReference> getDmpExternalReferences() {
+        return dmpExternalReferences;
+    }
+
+    public void setDmpExternalReferences(List<DmpExternalReference> dmpExternalReferences) {
+        this.dmpExternalReferences = dmpExternalReferences;
+    }
 }
 
 
diff --git a/dmp-backend/core/src/main/java/eu/eudat/model/builder/DmpBlueprintBuilder.java b/dmp-backend/core/src/main/java/eu/eudat/model/builder/DmpBlueprintBuilder.java
index 46194e84c..38cb8584f 100644
--- a/dmp-backend/core/src/main/java/eu/eudat/model/builder/DmpBlueprintBuilder.java
+++ b/dmp-backend/core/src/main/java/eu/eudat/model/builder/DmpBlueprintBuilder.java
@@ -6,9 +6,14 @@ import eu.eudat.commons.types.dmpblueprint.DefinitionEntity;
 import eu.eudat.convention.ConventionService;
 import eu.eudat.data.DmpBlueprintEntity;
 import eu.eudat.model.DmpBlueprint;
+import eu.eudat.model.DmpExternalReference;
+import eu.eudat.model.ExternalReference;
 import eu.eudat.model.builder.dmpblueprintdefinition.DefinitionBuilder;
+import eu.eudat.query.DmpExternalReferenceQuery;
 import gr.cite.tools.data.builder.BuilderFactory;
+import gr.cite.tools.data.query.QueryFactory;
 import gr.cite.tools.exception.MyApplicationException;
+import gr.cite.tools.fieldset.BaseFieldSet;
 import gr.cite.tools.fieldset.FieldSet;
 import gr.cite.tools.logging.DataLogEntry;
 import gr.cite.tools.logging.LoggerService;
@@ -19,21 +24,24 @@ import org.springframework.context.annotation.Scope;
 import org.springframework.stereotype.Component;
 
 import java.util.*;
+import java.util.stream.Collectors;
 
 @Component
 @Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)
 public class DmpBlueprintBuilder extends BaseBuilder<DmpBlueprint, DmpBlueprintEntity> {
 
     private final BuilderFactory builderFactory;
+    private final QueryFactory queryFactory;
     private final XmlHandlingService xmlHandlingService;
     private EnumSet<AuthorizationFlags> authorize = EnumSet.of(AuthorizationFlags.None);
 
     @Autowired
     public DmpBlueprintBuilder(
             ConventionService conventionService,
-            BuilderFactory builderFactory, XmlHandlingService xmlHandlingService) {
+            BuilderFactory builderFactory, QueryFactory queryFactory, XmlHandlingService xmlHandlingService) {
         super(conventionService, new LoggerService(LoggerFactory.getLogger(DmpBlueprintBuilder.class)));
         this.builderFactory = builderFactory;
+        this.queryFactory = queryFactory;
         this.xmlHandlingService = xmlHandlingService;
     }
 
@@ -49,6 +57,9 @@ public class DmpBlueprintBuilder extends BaseBuilder<DmpBlueprint, DmpBlueprintE
         if (fields == null || data == null || fields.isEmpty())
             return new ArrayList<>();
         FieldSet definitionFields = fields.extractPrefixed(this.asPrefix(DmpBlueprint._definition));
+        FieldSet dmpExternalReferencesFields = fields.extractPrefixed(this.asPrefix(ExternalReference._dmpExternalReferences));
+        Map<UUID, List<DmpExternalReference>> dmpExternalReferenceMap = this.collectDmpExternalReferences(dmpExternalReferencesFields, data);
+
         List<DmpBlueprint> models = new ArrayList<>();
         for (DmpBlueprintEntity d : data) {
             DmpBlueprint m = new DmpBlueprint();
@@ -63,9 +74,29 @@ public class DmpBlueprintBuilder extends BaseBuilder<DmpBlueprint, DmpBlueprintE
                 DefinitionEntity definition = this.xmlHandlingService.xmlSerializableFromXmlSafe(DefinitionEntity.class, d.getDefinition());
                 m.setDefinition(this.builderFactory.builder(DefinitionBuilder.class).authorize(this.authorize).build(definitionFields, definition));
             }
+            if (!dmpExternalReferenceMap.isEmpty() && dmpExternalReferenceMap != null && dmpExternalReferenceMap.containsKey(d.getId())) m.setDmpExternalReferences(dmpExternalReferenceMap.get(d.getId()));
+            models.add(m);
             models.add(m);
         }
         this.logger.debug("build {} items", Optional.of(models).map(List::size).orElse(0));
         return models;
     }
+
+    private Map<UUID, List<DmpExternalReference>> collectDmpExternalReferences(FieldSet fields, List<DmpBlueprintEntity> datas) throws MyApplicationException {
+        if (fields.isEmpty() || datas.isEmpty()) return null;
+        this.logger.debug("checking related - {}", DmpExternalReference.class.getSimpleName());
+
+        Map<UUID, List<DmpExternalReference>> itemMap = null;
+        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(DmpExternalReference._dmp, DmpBlueprint._id));
+        DmpExternalReferenceQuery query = this.queryFactory.query(DmpExternalReferenceQuery.class).authorize(this.authorize).dmpIds(datas.stream().map(x -> x.getId()).distinct().collect(Collectors.toList()));
+        itemMap = this.builderFactory.builder(DmpExternalReferenceBuilder.class).authorize(this.authorize).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());
+
+        if (!fields.hasField(this.asIndexer(DmpExternalReference._dmp, DmpBlueprint._id))) {
+            itemMap.values().stream().flatMap(List::stream).filter(x -> x != null && x.getDmp() != null).map(x -> {
+                x.getDmp().setId(null);
+                return x;
+            }).collect(Collectors.toList());
+        }
+        return itemMap;
+    }
 }
diff --git a/dmp-backend/core/src/main/java/eu/eudat/model/censorship/DmpBlueprintCensor.java b/dmp-backend/core/src/main/java/eu/eudat/model/censorship/DmpBlueprintCensor.java
index 538c8cd78..c5b1360fd 100644
--- a/dmp-backend/core/src/main/java/eu/eudat/model/censorship/DmpBlueprintCensor.java
+++ b/dmp-backend/core/src/main/java/eu/eudat/model/censorship/DmpBlueprintCensor.java
@@ -41,6 +41,8 @@ public class DmpBlueprintCensor extends BaseCensor {
         this.authService.authorizeForce(Permission.BrowseDmpBlueprint);
         FieldSet definitionFields = fields.extractPrefixed(this.asIndexerPrefix(DmpBlueprint._definition));
         this.censorFactory.censor(DefinitionCensor.class).censor(definitionFields, userId);
+        FieldSet dmpExternalReferencesFields = fields.extractPrefixed(this.asIndexerPrefix(DmpBlueprint._dmpExternalReferences));
+        this.censorFactory.censor(DmpExternalReferenceCensor.class).censor(dmpExternalReferencesFields, userId);
     }
 
 }