Lenis-Manzano, Sandra Janeth, et al. “Histology of Somatic Embryogenesis Induced in Embryos of Mature Seeds of the Apomictic <i>Urochloa brizantha< I>”;. Pesquisa Agropecuaria Brasileira, vol. 45, no. 5, Jan. 2011, pp. 435-41, doi:10.1590/S1678-3921.pab2010.v45.3565.