Physics Letters B
Physics Letters B > 2011 > 696 > 3 > 220-226
Physics Letters B > 2011 > 698 > 2 > 140-145
Physics Letters B > 2011 > 699 > 3 > 169-173
Physics Letters B > 2011 > 701 > 1 > 101-106
Physics Letters B > 2011 > 701 > 1 > 82-88