Physics Letters A
Physics Letters A > 2016 > 380 > 16 > 1408-1413
Physics Letters A > 2016 > 380 > 18-19 > 1589-1592
Physics Letters A > 2016 > 380 > 48 > 4033-4038
Physics Letters A > 2016 > 380 > 16 > 1408-1413
Physics Letters A > 2016 > 380 > 18-19 > 1589-1592
Physics Letters A > 2016 > 380 > 48 > 4033-4038