Assis, José Geraldo Aquino, Félix Pérez-García, e Maria Elena Gonzáles-Benito. 2015. “Tetrazolium Test for Seed Viability and Germinability of Melocactus Ernestii Vaupel Subsp. Ernestii and Melocactus Zehntneri (Britton &Amp; Rose) Luetzelb. (Cactaceae)”. Gaia Scientia 9 (2). https://periodicos.ufpb.br/ojs/index.php/gaia/article/view/24014.