International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 2 > 354-363
International Journal of Theoretical Physics > 2019 > 58 > 6 > 1999-2008
International Journal of Theoretical Physics > 2019 > 58 > 7 > 2081-2090
International Journal of Theoretical Physics > 2019 > 58 > 11 > 3863-3870