BANYAN IBRAHIM AL-SALIM, A. minimal blocking set of size (30) in PG (2,19) plane. Journal of Education and Science, [S. l.], v. 25, n. 3, p. 191–205, 2012. DOI: 10.33899/edusj.2012.59202. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42122. Acesso em: 10 sep. 2025.