International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 2 > 615-630
International Journal of Theoretical Physics > 2019 > 58 > 5 > 1509-1523
International Journal of Theoretical Physics > 2019 > 58 > 2 > 615-630
International Journal of Theoretical Physics > 2019 > 58 > 5 > 1509-1523