International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 3 > 992-1000
International Journal of Theoretical Physics > 2019 > 58 > 8 > 2592-2602
International Journal of Theoretical Physics > 2019 > 58 > 3 > 992-1000
International Journal of Theoretical Physics > 2019 > 58 > 8 > 2592-2602