Physics Letters A
Physics Letters A > 2016 > 380 > 3 > 377-380
Physics Letters A > 2016 > 380 > 9-10 > 998-1002
Physics Letters A > 2016 > 380 > 17 > 1517-1525
Physics Letters A > 2016 > 380 > 3 > 377-380
Physics Letters A > 2016 > 380 > 9-10 > 998-1002
Physics Letters A > 2016 > 380 > 17 > 1517-1525