PORTUGUEZ-GARCÍA, M.; RODRÍGUEZ-RUIZ, A.; HERRERA-MURILLO, F.; GONZÁLEZ-LUTZ, M. Influence of shade and scarification on the germination of Ischaemum rugosum Salisb. Agronomía Mesoamericana, v. 31, n. 3, p. 781-792, 1 set. 2020.