Physics Letters A
Physics Letters A > 2016 > 380 > 4 > 614-620
Physics Letters A > 2016 > 380 > 40 > 3270-3277
Physics Letters A > 2016 > 380 > 45 > 3832-3835
Physics Letters A > 2016 > 380 > 4 > 614-620
Physics Letters A > 2016 > 380 > 40 > 3270-3277
Physics Letters A > 2016 > 380 > 45 > 3832-3835