Physics Letters A
Physics Letters A > 2016 > 380 > 3 > 495-501
Physics Letters A > 2016 > 380 > 5-6 > 645-653
Physics Letters A > 2016 > 380 > 11-12 > 1184-1188
Physics Letters A > 2016 > 380 > 3 > 495-501
Physics Letters A > 2016 > 380 > 5-6 > 645-653
Physics Letters A > 2016 > 380 > 11-12 > 1184-1188