diff --git a/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
index 0465613..6520be0 100644
--- a/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
@@ -48,6 +48,7 @@ public class ArticleManagerBean implements IArticleManager, Serializable {
 
 	public void updateArticle(Article article) {
 		em.merge(article);
+		em.flush();
 		
 	}
 
@@ -57,8 +58,8 @@ public class ArticleManagerBean implements IArticleManager, Serializable {
 		em.flush();
 	}
 
-	public Article getArticle(Integer id) {
-		return em.find(Article.class, id);
+	public Article getArticle(Integer articleId) {
+		return em.find(Article.class, articleId);
 	}
 	
 	@SuppressWarnings("unchecked")
@@ -70,46 +71,45 @@ public class ArticleManagerBean implements IArticleManager, Serializable {
 	
 		Query query = em.createQuery("from Article a WHERE a.conference = ? ORDER BY a.title");
 		query.setParameter(1, conf);
-		if (query.getResultList()!=null)
-		{System.out.println("je fini ici ds articleBean");}
 		return query.getResultList();
 	}
 
 	@SuppressWarnings("unchecked")
-	public List<Article> getArticleOfAuthor(Conference conf, User author) {
+	public List<Article> getArticleOfAuthor(Integer confId, String authorId) {
+		Conference conf = em.find(Conference.class, confId);
+		User author = em.find(User.class, authorId);
 		Query query = em.createQuery("from Article a WHERE conference = ? and mainAuthor = ? ORDER BY a.title");
 		query.setParameter(1, conf);
 		query.setParameter(2, author);
 		return query.getResultList();
 	}
-
-	
-	/*  @SuppressWarnings("unchecked")
-	public List<Article> getAllArticles()
-	  {
-		  Query query =em.createQuery("SELECT a FROM Article a ORDER BY a.id");
-		   return query.getResultList();
-	  }*/
 	     
-	public List<Article> getArticlesOfMember(Conference conf, User member){
+	public List<Article> getArticlesOfMember(Integer confId, String memberId){
 		//TODO
 		return null;
 	}
 	
-	public void assignArticleToPCMember(Article article,User pcMember){
-		article.assignToPCMember(pcMember);
+	public void assignArticleToPCMember(Integer articleId,String memberId){
+		Article article = this.getArticle(articleId);
+		User PCMember = em.find(User.class, memberId);
+		article.assignToPCMember(PCMember);
 		em.flush();
 	}
 
-	public List<User> getArticlePCMembers(Article article) {
+	public List<User> getArticlePCMembers(Integer articleId) {
+		Article article = this.getArticle(articleId);
 		return (List<User>) article.getPCMembers();
 	}
 	
-	public void delegateArticleToReferee(Article article, User referee, User pcMember){
-		article.delegateTo(referee,pcMember);
+	public void delegateArticleToReferee(Integer articleId, String refereeId, String memberId){
+		Article article = this.getArticle(articleId);
+		User PCMember = em.find(User.class, memberId);
+		User referee = em.find(User.class, refereeId);
+		article.delegateTo(referee,PCMember);
 	}
 
-	public List<User> getArticleReferees(Article article) {
+	public List<User> getArticleReferees(Integer articleId) {
+		Article article = this.getArticle(articleId);
 		return (List<User>) article.getReferees();
 	}