Physics Letters B
Physics Letters B > 1999 > 460 > 1-2 > 94-102
Physics Letters B > 1999 > 467 > 3-4 > 238-246
Physics Letters B > 2000 > 488 > 1 > 90-96
Physics Letters B > 2004 > 587 > 1-2 > 121-132
Physics Letters B > 2004 > 596 > 1-2 > 123-131