Fenecios, Jonald, and Abraham Racca. “Equivalence of Lebesgue’s Theorem and Baire Characterization Theorem”. Journal of the Indonesian Mathematical Society 28, no. 2 (July 30, 2022): 158–163. Accessed October 5, 2024. http://jims-a.org./index.php/jimsa/article/view/1064.