References
- Contreras, E. F., 1983: Variaciones en la hidrologia y concentrationes de nutrientes del area estuarino- lagunar de Tuxpam-Tampamachoco, Veracruz, Mexico. — Biotica 8(2): 201–213.
- Contreras, E. F. 1991: Clasification trofica de lagunas costeras. — Ciencia 42: 227–232.
- Contreras, E. F. & Gutierrez, F. M., 1989: Hidrologia, nutrientes y productividad primaria en lagunas costeras. — In: De La Rosa, V. J. & Gonzalez, F. F. (eds.): Temas de oceanografia biologica en Mexico. Cap. 3: 57–78. UABC.
- Inl and Waters Directorate, Water Quality Branch, 1974: Analytical methods manual. Ottawa, Canada.
- Menzel, D. W. & Corwin, N., 1965: The measurements of total phosphorus in sea water based on the liberation of organically bound fractions by persulfate oxidation. — Limnol. Oceanogr. 10: 280–282.
- Smith, V. H., 1985: Predictive models for the biomass of blue-green algae in lakes. — Wat Res. Bull. 21: 148–153.
- Smith, V. H. 1986: Light and nutrient effects on the relative biomass of blue-green algae in lake phytoplankton. — Can. J. Fish. Aquat Sa. 43: 148–153.
- Smith, V. H., Willen, E. & Karlsson, B., 1987: Predicting the summer peak biomass of four species of blue-green in Swedish lakes. — Wat. Res. Bull. 23: 873–879.
- Solorzano, L., 1969: Determination of ammonia in natural water by the phenol-hypochlorite method. — Limnol. Oceanogr. 14: 799–801.
- Strickland, J. D. H. & Parsons, I. R., 1968: A manual of sea water analysis. — Fish. Res. Bd. of Canada, Ottawa, 310 p.
- Vollenweider, R. & Kerekes, J., 1981: Background and summary results of the OECD cooperative program on eutrophication. Int. Symp. on Inland Waters and Lake Restoration: 25–36. Sept. 8–12, 1980. Portland, Maine, U.S., EPS, Washington D.C. EPA 440/5-81–110.
- Vollenweider, R. & Kerekes, J. 1982 (OECD 1982): Eutrophication of waters, monitoring, assessment and control. Final Report. OECD Cooperative program on monitoring of inland waters (Eutrophication control), Environment Directorate, OECD. Paris. 154 pp.