Ribeiro, E. M., M. V. Meiado, e I. R. Leal. “The Role of Clonal and Sexual Spread in Cacti Species Dominance at the Brazilian Caatinga”. Gaia Scientia, vol. 9, nº 2, abril de 2015, https://periodicos.ufpb.br/index.php/gaia/article/view/24017.