Socolowski, Fábio, Daniela Cristine Mascia Vieira, Edson Simão, and Massanori Takaki. 2010. “Influence of Light and Temperature on Seed Germination of Cereus Pernambucensis Lemaire (Cactaceae)”. Biota Neotropica 10 (2). Sao Paulo, Brazil. //www.biotaneotropica.org.br/BN/article/view/675.