Physics Letters A
Physics Letters A > 2017 > 381 > 11 > 1009-1013
Physics Letters A > 2017 > 381 > 11 > 1003-1008
Physics Letters A > 2017 > 381 > 28 > 2250-2255
Physics Letters A > 2017 > 381 > 31 > 2502-2509
Physics Letters A > 2017 > 381 > 36 > 3054-3061