Juhász, Istvan, and William A. R. Weiss. “Nowhere Dense Choices and π-Weight”. Annales Mathematicae Silesianae 2 (September 30, 1986): 85–91. Accessed May 8, 2025. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14327.