Physics Letters A
Physics Letters A > 1995 > 198 > 2 > 119-121
Physics Letters A > 1995 > 198 > 2 > 134-138
Physics Letters A > 1995 > 198 > 2 > 131-133
Physics Letters A > 1995 > 198 > 2 > 94-99
Physics Letters A > 1995 > 198 > 2 > 126-130
Physics Letters A > 1995 > 198 > 2 > 105-112
Physics Letters A > 1995 > 198 > 2 > 151-157
Physics Letters A > 1995 > 198 > 2 > 100-104
Physics Letters A > 1995 > 198 > 2 > 158-162
Physics Letters A > 1995 > 198 > 2 > 139-144
Physics Letters A > 1995 > 198 > 2 > 113-118
Physics Letters A > 1995 > 198 > 2 > 85-88
Physics Letters A > 1995 > 198 > 2 > 79-84
Physics Letters A > 1995 > 198 > 3 > 261-266
Physics Letters A > 1995 > 198 > 3 > 243-247
Physics Letters A > 1995 > 198 > 3 > 205-208
Physics Letters A > 1995 > 198 > 3 > 201-204
Physics Letters A > 1995 > 198 > 3 > 248-250
Physics Letters A > 1995 > 198 > 3 > 212-216
Physics Letters A > 1995 > 198 > 3 > 256-260