E. P. Inyang, J. E. Ntibi, F. Ayedun, E. A. Ibanga, and E. S. William, “APPLICABILITY OF HULTHÉN-HELLMANN POTENTIAL TO PREDICT THE MASS-SPECTRA OF HEAVY MESONS VIA SERIES EXPANSION METHOD”, NJP, vol. 30, no. 2, pp. 140–145, Nov. 2021.