@article{Walters_Lemma_2021, title={Triangular Numbers in actions}, volume={4}, url={https://gphjournal.org/index.php/m/article/view/402}, number={04}, journal={GPH - International Journal of Mathematics}, author={Walters, Aaliyah and Lemma, Mulatu}, year={2021}, month={Apr.}, pages={32-44}