Cameron, Vinoo. “Theorem of 1:3 Pythagoras Cone and Prime Number Predictive Double Spirals”. Journal of Progressive Research in Mathematics 14, no. 1 (October 6, 2018): 2327-2333. Accessed May 9, 2024. http://scitecresearch.com/journals/index.php/jprm/article/view/1607.