VAN DER HOFF, Quay; GREEFF, Johanna C.; KLOPPERS, P. Hendrik. Numerical investigation into the existence of limit cycles in two-dimensional predator–prey systems. South African Journal of Science, [S. l.], v. 109, n. 5/6, p. 6, 2013. DOI: 10.1590/sajs.2013/1143. Disponível em: https://sajs.co.za/article/view/3888. Acesso em: 3 may. 2024.