International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2019 > 58 > 2 > 391-398
International Journal of Theoretical Physics > 2019 > 58 > 6 > 1828-1835
International Journal of Theoretical Physics > 2019 > 58 > 7 > 2069-2080
International Journal of Theoretical Physics > 2019 > 58 > 9 > 3025-3035
International Journal of Theoretical Physics > 2019 > 58 > 12 > 4241-4248