1. APHA 1985 Standard methods for the examination of water and wastewater 1268
2. Factors regulating phytoplankton and zooplankton biomass in temperate rivers;Basu;Limnology and Oceanography,1996
3. Limnological investigations on biotic communities in the Middle Paraná River Valley;Bonetto;Verhandlungen Internationale, Vereinige ung für Theoretische und Angewandte Limnologie,1969
4. Fitoplancton y producción primaria del río Alto Paraná (Argentina);Bonetto;Physis,1983
5. Cabrera AL Willink A 1980 Biogeografia de América Latina 122