International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 3 > 713-718
International Journal of Theoretical Physics > 2019 > 58 > 6 > 1854-1860
International Journal of Theoretical Physics > 2019 > 58 > 3 > 713-718
International Journal of Theoretical Physics > 2019 > 58 > 6 > 1854-1860