@article {Loubna12,
   author = {Mekouar, Loubna and Iraqi, Youssef and Boutaba, Raouf},
   title = {An analysis of peer similarity for recommendations in P2P systems},
   journal = {Multimedia Tools and Applications},
   publisher = {Springer},
   volume = {60},
   issue = {2},
   month={september},
   year = {2012}
}