1. Ahl, T. &S. Odén, 1975. Närsaltkällor -en översikt NORDFORSK, Helsinki, publ. 1975: 1: 99–133 (in Swedish).
2. Ahl, T. &T. Wiederholm, 1977. Svenska vattenkvalitets-kriterier. Eutrofíerande ämnen. Statens Naturvårdsverk.Stockholm PM-series 918. 124 pp. (in Swedish).
3. Alexander, G. R., 1978. The ratiande for a ban on detergent phosphate in the Great Lakes Basin. In Phosphorus in the Environment: its chemistry and biochemistry. A Ciba Foundation Symposium, Elsevier, Amsterdam: 269–284.
4. Bargh, B. J., 1977. Output of water, suspended sediment and phosphorus and nitrogen forms from a small forested catchment. New Zealand Forestry Science 7: 162–171.
5. Berge, D., S. Rognerud &M. Johannessen, 1979. Videreutvikling av fosforbelastningsmodellen for store sjiktede innsjøer. NIVA-årbok 1979, Oslo: 39–42 (in Norwegian).