Maireche, A. 2020. A New Approach to the Approximate Analytic Solution of the Three-Dimensional Schrӧdinger Equation for Hydrogenic and Neutral Atoms in the Generalized Hellmann Potential Model. Ukrainian Journal of Physics. 65, 11 (Nov. 2020), 987. DOI:https://doi.org/10.15407/ujpe65.11.987.