Physics Letters A
Physics Letters A > 2010 > 374 > 6 > 854-860
Physics Letters A > 2010 > 374 > 9 > 1154-1158
Physics Letters A > 2010 > 374 > 13-14 > 1560-1564
Physics Letters A > 2010 > 374 > 17-18 > 1843-1848
Physics Letters A > 2010 > 374 > 38 > 3951-3956
Physics Letters A > 2010 > 374 > 42 > 4316-4320
Physics Letters A > 2010 > 374 > 45 > 4607-4613