E. P. INYANG, E. S. William, E. Omugbe, E. P. Inyang, E. A. Ibanga, F. Ayedun, I. O. Akpan, and J. E. Ntibi, Application of Eckart-Hellmann potential to study selected diatomic molecules using Nikiforov-Uvarov-Functional analysis method, Rev. Mex. Fís. 68, (2022).