Physics Letters B
Physics Letters B > 1998 > 420 > 1-2 > 13-19
Physics Letters B > 1998 > 422 > 1-4 > 26-32
Physics Letters B > 2000 > 487 > 1-2 > 118-124
Physics Letters B > 2002 > 528 > 3-4 > 228-232
Physics Letters B > 2004 > 590 > 1-2 > 76-85