Parnell, J. R. (1968). Observations on the fauna directly connected with sedges of the genus <i>Cyperus</i> in Costa Rica, Central America I. <i>Sibariops confusus</i> (Boh) (Col., Curculionidae) on <i>Cyperus ferax</i> L. Rich. Revista De Biología Tropical, 16(2), 247–253. https://doi.org/10.15517/rev.biol.trop.v16i2.28153