Physics Letters B
Physics Letters B > 2011 > 696 > 5 > 495-498
Physics Letters B > 2011 > 697 > 4 > 280-287
Physics Letters B > 2011 > 699 > 3 > 174-176
Physics Letters B > 2011 > 700 > 1 > 75-78
Physics Letters B > 2011 > 700 > 5 > 385-388