Physics Letters B
Physics Letters B > 2009 > 678 > 2 > 164-167
Physics Letters B > 2009 > 678 > 5 > 427-433
Physics Letters B > 2009 > 679 > 4 > 302-305
Physics Letters B > 2009 > 680 > 3 > 205-211
Physics Letters B > 2009 > 682 > 1 > 89-92