Physics Letters B
Physics Letters B > 1999 > 449 > 3-4 > 299-305
Physics Letters B > 2000 > 478 > 1-3 > 127-136
Physics Letters B > 2001 > 504 > 3 > 225-234
Physics Letters B > 2001 > 508 > 3-4 > 279-289
Physics Letters B > 2004 > 578 > 1-2 > 91-98