JOSHUA, Muendo; STEPHEN, Dorca; MUNYWOKI, Michael. Frankl’s Union-Closed Sets Conjecture. International Journal of Modern Developments in Engineering and Science, [S. l.], v. 4, n. 7, p. 10–14, 2025. Disponível em: https://journal.ijmdes.com/ijmdes/article/view/279. Acesso em: 6 oct. 2025.