Duman, Merve, Refik Keskin, and Leman Hocaoğlu. “Padovan Numbers As Sum of Two Repdigits”. Proceedings of the Bulgarian Academy of Sciences 76, no. 9 (October 1, 2023): 1326–1334. Accessed November 3, 2026. https://proceedings.bas.bg/index.php/cr/article/view/378.