Physics Letters A
Physics Letters A > 2016 > 380 > 3 > 397-401
Physics Letters A > 2016 > 380 > 5-6 > 689-695
Physics Letters A > 2016 > 380 > 16 > 1395-1400
Physics Letters A > 2016 > 380 > 3 > 397-401
Physics Letters A > 2016 > 380 > 5-6 > 689-695
Physics Letters A > 2016 > 380 > 16 > 1395-1400