Physics Letters A
Physics Letters A > 2016 > 380 > 5-6 > 684-688
Physics Letters A > 2016 > 380 > 5-6 > 689-695
Physics Letters A > 2016 > 380 > 47 > 4013-4017
Physics Letters A > 2016 > 380 > 5-6 > 684-688
Physics Letters A > 2016 > 380 > 5-6 > 689-695
Physics Letters A > 2016 > 380 > 47 > 4013-4017