Lakes and reservoirs. Vol. 3 : Water quality : the impact of eutrophication / text: Sven Erik Jorgensen [et al.]. — 2001. — 26 с. — (Short series on the "Planning and management of lakes and reservoirs" ; vol. 3) - Jorgensen, S. E. (Short series on the "Planning and management of lakes and reservoirs", 2001)