Physics Letters B
Physics Letters B > 2012 > 709 > 3 > 133-136
Physics Letters B > 2012 > 716 > 2 > 366-369
Physics Letters B > 2012 > 717 > 1-3 > 6-9
Physics Letters B > 2012 > 709 > 3 > 133-136
Physics Letters B > 2012 > 716 > 2 > 366-369
Physics Letters B > 2012 > 717 > 1-3 > 6-9