International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 1 > 209-220
International Journal of Theoretical Physics > 2019 > 58 > 5 > 1613-1625
International Journal of Theoretical Physics > 2019 > 58 > 1 > 209-220
International Journal of Theoretical Physics > 2019 > 58 > 5 > 1613-1625