International Journal of Theoretical Physics
International Journal of Theoretical Physics > 2016 > 55 > 1 > 609-616
International Journal of Theoretical Physics > 2016 > 55 > 1 > 191-201
International Journal of Theoretical Physics > 2016 > 55 > 1 > 107-123
International Journal of Theoretical Physics > 2016 > 55 > 8 > 3722-3736