International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 4 > 1161-1171
International Journal of Theoretical Physics > 2019 > 58 > 5 > 1667-1675
International Journal of Theoretical Physics > 2019 > 58 > 4 > 1161-1171
International Journal of Theoretical Physics > 2019 > 58 > 5 > 1667-1675