Graybeal, Christy Danko, and Tricia K. Strickland. “The Trouble With KISSing and Other Mnemonic Devices”. Ohio Journal of School Mathematics 78, no. 1 (January 9, 2018). Accessed May 3, 2024. https://ohiomathjournal.org/index.php/OJSM/article/view/6126.