International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 3 > 931-938
International Journal of Theoretical Physics > 2019 > 58 > 6 > 1901-1907
International Journal of Theoretical Physics > 2019 > 58 > 3 > 931-938
International Journal of Theoretical Physics > 2019 > 58 > 6 > 1901-1907