Physics Letters B
Physics Letters B > 2001 > 504 > 1-2 > 181-187
Physics Letters B > 2001 > 504 > 1-2 > 6-14
Physics Letters B > 2001 > 508 > 3-4 > 279-289
Physics Letters B > 2001 > 510 > 1-4 > 117-124
Physics Letters B > 2001 > 513 > 1-2 > 103-111