1. Lighting for Plant Growth;Bickford,1972
2. The life cycle of water lettuce (Pistia stratiotes L.);Bua-ngam;Philipp. Weed Sci. Bull.,1975
3. Observaçôes sobre a biologia reproductive de Pistia stratiotes L. (Araceae);Da Silva;Acta Amazonica,1981
4. Physiology of germination in Pistia stratiotes seeds;Datta;Biologia (Bratislava),1969