References
- APHA, 1992: Standard Methods for the Examination of Water and Wastewater. 18th Edition. — American Public Health Association, In Washington, D.C.
- Cruz, M. J. M. & Valente, A. C. N., 1998: Recreational fishery in Alto Lindoso Reservoir (River Lima, north Portugal). — Ital. J. Zool. 65: 533–537.
- Koroleff, R, 1970: Revised version of direct determination of ammonia in natural waters as indophenol blue. Int. Cons. Explor. Sea, CM 1969/C9. ICES. Information on techniques and methods for seawater analysis. — Interlab. Rep. 3: 19–22.
- Machado Cruz, J. M., Galhano, M. H., Branco, R., Cerqueira, M. M., Guimarães, M. C., Coelho, M., Afonso, A. & Santos, P. T., 1989: River Ave. NATO PO-Rivers Project, Activity D — Biological characterisation. Final Report, 52 pp.
- Strickland, J. D. & Parsons, T. R., 1972. A Practical Handhook of Seawater Analysis. — Fishery Research Board of Canada 167.