Kowitz, Krzysztof. “Twin, Cousin, and Sexy Prime Counting Function. Explicit Formulas”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 8 (September 4, 2024): 1260 - 1264. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7567.