International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 4 > 1337-1349
International Journal of Theoretical Physics > 2019 > 58 > 7 > 2081-2090
International Journal of Theoretical Physics > 2019 > 58 > 10 > 3282-3294
International Journal of Theoretical Physics > 2019 > 58 > 10 > 3239-3251