Physics Letters A
Physics Letters A > 2016 > 380 > 7-8 > 886-895
Physics Letters A > 2016 > 380 > 33 > 2540-2543
Physics Letters A > 2016 > 380 > 33 > 2531-2539
Physics Letters A > 2016 > 380 > 7-8 > 886-895
Physics Letters A > 2016 > 380 > 33 > 2540-2543
Physics Letters A > 2016 > 380 > 33 > 2531-2539