Physics Letters A
Physics Letters A > 1996 > 210 > 6 > 433-436
Physics Letters A > 1996 > 210 > 6 > 371-376
Physics Letters A > 1996 > 210 > 6 > 423-428
Physics Letters A > 1996 > 210 > 6 > 416-422
Physics Letters A > 1996 > 210 > 6 > 409-415
Physics Letters A > 1996 > 210 > 6 > 391-401
Physics Letters A > 1996 > 210 > 6 > 377-381
Physics Letters A > 1996 > 210 > 6 > 382-390
Physics Letters A > 1996 > 210 > 6 > 429-432
Physics Letters A > 1996 > 210 > 6 > 402-408