diff --git a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
index d7a598b..0f88886 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
@@ -31,6 +31,11 @@ public interface IUserManager {
 	public List<User> getUsers();
 	public List<User> getUsers(Conference conf);
 	public List<User> getUsers(int conf_id,Role.RoleType type);
+	public List<User> getRefereesOFPCMemberForArticle(String PCMemberLogin, Integer articleId);
+	public List<User> getPCMemberForArticle(Integer articleId);
+	
+	
+	//roles methods
 	/**
 	 * Create and adds a role to a user
 	 * @param login The login of the user
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
index ee6ae51..283f5cf 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
@@ -4,8 +4,6 @@
 package org.yacos.core.users;
 
 
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
 import java.util.List;
 
 import javax.ejb.Stateless;
@@ -110,6 +108,27 @@ public class UserManagerBean implements IUserManager{
 		return query.getResultList();
 	}
 	
+	 
+	@SuppressWarnings("unchecked")
+	public List<User> getPCMemberForArticle(Integer articleId){
+		Query query = em.createQuery("select user from User user, Articles_PCMembers_map a WHERE a.user_id = user.login and a.article_id = ?");
+		query.setParameter(1, articleId); 
+		return query.getResultList();
+	}
+
+	@SuppressWarnings("unchecked")
+	public List<User> getRefereesOFPCMemberForArticle(String PCMemberLogin, Integer articleId){
+		Query query = em.createQuery("select user from User user, Articles_referees_map a WHERE a.user_id = user.login and a.article_id = ?");
+		query.setParameter(1, articleId);
+		query.setParameter(2, PCMemberLogin);
+		return query.getResultList();
+	}
+	
+	/*
+	 * 
+	 * methodes de Roles
+	 */
+	
 	public List<Role> getRoles() {
 		// TODO Auto-generated method stub
 		return null;
@@ -118,9 +137,6 @@ public class UserManagerBean implements IUserManager{
 	public void addRoleForConference(String login, RoleType role, Integer conferenceId) {
 		User user = em.find(User.class, login);
 		Conference conference = em.find(Conference.class, conferenceId);
-		//if(user.hasRoleForConference(role, conference)){
-		//	return;
-		//}
 		
 		Role newRole = new Role();
 		newRole.setUser(user);
@@ -167,4 +183,5 @@ public class UserManagerBean implements IUserManager{
 		return aQuery.getResultList();
 	}
 	
+	
 }