Pitcairn CER, Leith ID, N. vanDijk, Sutton MA.
Refining and testing the Ellenberg Index biomonitoring method at the intensive sites. In: Biomonitoring methods for assessing the impacts of nitrogen pollution: refinement and testing. JNCC; 2005. p. 230.
Peters RH.
The role of prediction in limnology. Limnology Oceanography. 1986 ;31:1143-1159.