Seshavatharam, U. V. S. ., and S. . Lakshminarayana. ‚ÄúCosmologically Strengthening Hydrogen Atom in Black Hole Universe‚ÄĚ. Journal of Nuclear Physics, Material Sciences, Radiation and Applications, vol. 3, no. 2, Feb. 2016, pp. 265-78, doi:10.15415/jnp.2016.32024.