P Systems for Patterns of Sierpi´nski Square Snowflake Curve. Punjab University Journal of Mathematics, [S. l.], v. 52, n. 11, p. 11–18, 2025. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/379. Acesso em: 29 jun. 2025.