Gryniuk, O.B., and B.E. Grinyuk. “Universal Coordinate Gaussian Basis for Calculations of the Bound States of a Few-Particle System”. Ukrainian Journal of Physics 68, no. 9 (October 20, 2023): 587. Accessed May 28, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023226.