Physics Letters A
Physics Letters A > 2014 > 378 > 3 > 100-108
Physics Letters A > 2014 > 378 > 24-25 > 1683-1686
Physics Letters A > 2014 > 378 > 28-29 > 1909-1912
Physics Letters A > 2014 > 378 > 35 > 2597-2602
Physics Letters A > 2014 > 378 > 45 > 3397-3401