[1]
P. B. SCHWARTSBURD, P. L. R. DE MORAES, and K. L. B. LOPES-MATTOS, “Recognition of two morpho-types in eastern South American brackens (<em>Pteridium—</em>Dennstaedtiaceae<em>—</em>Polypodiopsida)”, Phytotaxa, vol. 170, no. 2, pp. 103–117, May 2014.