Physics Letters A
Physics Letters A > 2016 > 380 > 7-8 > 958-964
Physics Letters A > 2016 > 380 > 18-19 > 1672-1676
Physics Letters A > 2016 > 380 > 37 > 2993-2998
Physics Letters A > 2016 > 380 > 7-8 > 958-964
Physics Letters A > 2016 > 380 > 18-19 > 1672-1676
Physics Letters A > 2016 > 380 > 37 > 2993-2998