Physics Letters A
Physics Letters A > 2010 > 374 > 13-14 > 1481-1487
Physics Letters A > 2010 > 374 > 21 > 2188-2194
Physics Letters A > 2010 > 374 > 36 > 3726-3732
Physics Letters A > 2010 > 374 > 13-14 > 1481-1487
Physics Letters A > 2010 > 374 > 21 > 2188-2194
Physics Letters A > 2010 > 374 > 36 > 3726-3732