Physics Letters A
Physics Letters A > 2016 > 380 > 4 > 628-633
Physics Letters A > 2016 > 380 > 17 > 1556-1561
Physics Letters A > 2016 > 380 > 38 > 3099-3102
Physics Letters A > 2016 > 380 > 4 > 628-633
Physics Letters A > 2016 > 380 > 17 > 1556-1561
Physics Letters A > 2016 > 380 > 38 > 3099-3102