Sáenz, J. A., G. S. Rawla, and R. Shanna. “<i>Pseudocolus grandis</i> A New Species for the Clathraceae”. Revista De Biología Tropical, vol. 30, no. 1, July 1982, pp. 102–104, https://revistas.ucr.ac.cr/index.php/rbt/article/view/25359.