ARAUJO-PARDO G.; MONTEJANO L.; MONTEJANO A.; VAZQUEZ-AVILA A. On transversal and 2-packing numbers in straight line systems on R2. Utilitas Mathematica , [S. l.], v. 105, 2017. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1160. Acesso em: 1 may. 2026.