Physics Letters A
Physics Letters A > 2016 > 380 > 37 > 2979-2983
Physics Letters A > 2016 > 380 > 38 > 3144-3148
Physics Letters A > 2016 > 380 > 43 > 3672-3677
Physics Letters A > 2016 > 380 > 37 > 2979-2983
Physics Letters A > 2016 > 380 > 38 > 3144-3148
Physics Letters A > 2016 > 380 > 43 > 3672-3677