BANYAN IBRAHIM AL-SALIM, A. minimal blocking set of size (30) in PG (2,19) plane. Journal of Education and Science (JES), [S. l.], v. 25, n. 3, p. 191–205, 2012. DOI: 10.33899/edusj.2012.59202. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23977. Acesso em: 6 aug. 2025.