International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 1 > 83-91
International Journal of Theoretical Physics > 2019 > 58 > 4 > 1172-1194
International Journal of Theoretical Physics > 2019 > 58 > 1 > 83-91
International Journal of Theoretical Physics > 2019 > 58 > 4 > 1172-1194