Physics Letters A
Physics Letters A > 2000 > 267 > 4 > 213-218
Physics Letters A > 2000 > 267 > 4 > 287-292
Physics Letters A > 2000 > 267 > 4 > 256-264
Physics Letters A > 2000 > 267 > 4 > 244-250
Physics Letters A > 2000 > 267 > 4 > 225-231
Physics Letters A > 2000 > 267 > 4 > 240-243
Physics Letters A > 2000 > 267 > 4 > 281-286
Physics Letters A > 2000 > 267 > 4 > 276-280
Physics Letters A > 2000 > 267 > 4 > 232-239
Physics Letters A > 2000 > 267 > 4 > 219-224
Physics Letters A > 2000 > 267 > 4 > 251-255
Physics Letters A > 2000 > 267 > 4 > 265-275