R.  Schmid, ?Comparative Anatomy and Morphology of Psiloxylon and Heteropyxis, and the Subfamilial and Tribal Classification of Myrtaceae?, TaxonTaxon, vol. 29, pp. 559-595, 1980.

R.  Schmid, ?A Resolution of the Eugenia-Syzygium Controversy (Myrtaceae)?, Am J BotAm J Bot, vol. 59, pp. 423-436, 1972.