Cycads of the world / David L. Jones; foreword by Dennis Wm. Stephenson, 1993
Flora of the Guianas. Series A, Phanerogams, Fascicle 9. Gymnosperms ; 208. Cycadaceae
; 208.1. Zamiaceae ; 209. Gnetaceae ; 210. Pinaceae ; 211. Podocarpaceae, including
Wood and Timber / D. Stevenson, T. Zanoni, B.H.J. ter Welle, P. Détienne, 1991
Site Library of Congress Authorities consulté le 14.04.2003, adresse : http://authorities.loc.gov/