Makarov , V.L., and S.V. Makarov. “Lagerra–Kelly Functions and Related Polynomials”. Reports of the National Academy of Sciences of Ukraine, no. 5 (October 28, 2022): 3–9. Accessed April 28, 2025. https://nasu-periodicals.org.ua/index.php/dp/article/view/2022-5-1.