Physics Letters A
Physics Letters A > 2007 > 365 > 4 > 278-283
Physics Letters A > 2007 > 365 > 4 > 295-300
Physics Letters A > 2007 > 365 > 4 > 263-267
Physics Letters A > 2007 > 365 > 4 > 284-289
Physics Letters A > 2007 > 365 > 4 > 309-314
Physics Letters A > 2007 > 365 > 4 > 328-334
Physics Letters A > 2007 > 365 > 4 > 268-272
Physics Letters A > 2007 > 365 > 4 > 341-344
Physics Letters A > 2007 > 365 > 4 > 290-294
Physics Letters A > 2007 > 365 > 4 > 335-340
Physics Letters A > 2007 > 365 > 4 > 315-327
Physics Letters A > 2007 > 365 > 4 > 273-277
Physics Letters A > 2007 > 365 > 4 > 301-308