Y. Soykan, “A Study on Sum Formulas of Generalized Pentanacci Sequence: Closed Forms of the Sum Formulas ∑_{k=0}ⁿx^{k}W_{k} and ∑_{k=1}ⁿx^{k}W_{-k}”, JPRM, vol. 18, no. 2, pp. 20-38, May 2021.