Physics Letters A
Physics Letters A > 2016 > 380 > 7-8 > 886-895
Physics Letters A > 2016 > 380 > 24 > 2105-2110
Physics Letters A > 2016 > 380 > 35 > 2757-2761
Physics Letters A > 2016 > 380 > 42 > 3500-3504
Physics Letters A > 2016 > 380 > 48 > 4049-4056