diff --git a/YACOSCore/ejbModule/org/yacos/core/article/Article.java b/YACOSCore/ejbModule/org/yacos/core/article/Article.java
index 3441d1f..aeb8f97 100644
--- a/YACOSCore/ejbModule/org/yacos/core/article/Article.java
+++ b/YACOSCore/ejbModule/org/yacos/core/article/Article.java
@@ -16,12 +16,12 @@ public class Article implements Serializable {
 	 */
 	private static final long serialVersionUID = 1L;
 
-	private int reference;
+	private int id;
 	private String title;
 	private String topic;
 	private String URL_article;
 	private String mainAuthor;
-	private ArrayList<String> secondaryAuthor;
+	private ArrayList<String> secondaryAuthors;
 	
 	private int state;
 
@@ -30,29 +30,29 @@ public class Article implements Serializable {
 	};
 
 	public Article() {
-		secondaryAuthor = new ArrayList<String>();
+		secondaryAuthors = new ArrayList<String>();
 	}
 
 	public Article(int reference, String title, String topic,
 			String url_article, String mainAuthor,
 			ArrayList<String> secondaryAuthor, int state) {
-		this.reference = reference;
+		this.id = id;
 		this.title = title;
 		this.topic = topic;
-		URL_article = url_article;
+		this.URL_article = url_article;
 		this.mainAuthor = mainAuthor;
-		this.secondaryAuthor = secondaryAuthor;
+		this.secondaryAuthors = secondaryAuthor;
 		this.state = state;
 	}
 
 	@Id
 	@GeneratedValue(strategy=GenerationType.AUTO)
-	public int getReference() {
-		return reference;
+	public int getId() {
+		return id;
 	}
 
-	public void setReference(int reference) {
-		this.reference = reference;
+	public void setId(int id) {
+		this.id = id;
 	}
 
 	public String getTitle() {
@@ -87,12 +87,12 @@ public class Article implements Serializable {
 		this.mainAuthor = mainAuthor;
 	}
 
-	public ArrayList<String> getSecondaryAuthor() {
-		return secondaryAuthor;
+	public ArrayList<String> getSecondaryAuthors() {
+		return secondaryAuthors;
 	}
 
-	public void setSecondaryAuthor(ArrayList<String> secondaryAuthor) {
-		this.secondaryAuthor = secondaryAuthor;
+	public void setSecondaryAuthors(ArrayList<String> secondaryAuthors) {
+		this.secondaryAuthors = secondaryAuthors;
 	}
 
 	public int getState() {