Soykan, Y. 2020. A Study on Generalized Fibonacci Numbers: Sum Formulas $\sum_{k=0}^{n}kx^{k}W_{k}^{3}$ and $\sum_{k=1}^{n}kx^{k}W_{-k}^{3}$ for the Cubes of Terms. Earthline Journal of Mathematical Sciences. 4, 2 (Jun. 2020), 297-331. DOI:https://doi.org/10.34198/ejms.4220.297331.