diff --git a/src/main/java/eu/dnetlib/dhp/schema/oaf/Result.java b/src/main/java/eu/dnetlib/dhp/schema/oaf/Result.java
index 8b2ff6f..d5b8d63 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/oaf/Result.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/oaf/Result.java
@@ -5,6 +5,10 @@ import java.io.Serializable;
 import java.util.*;
 import java.util.stream.Collectors;
 
+import javax.validation.Valid;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+
 import org.apache.commons.lang3.tuple.ImmutablePair;
 import org.apache.commons.lang3.tuple.Pair;
 
@@ -12,10 +16,6 @@ import eu.dnetlib.dhp.schema.common.AccessRightComparator;
 import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.oaf.utils.CleaningFunctions;
 
-import javax.validation.Valid;
-import javax.validation.constraints.NotEmpty;
-import javax.validation.constraints.NotNull;
-
 /**
  * The type Result.
  */