@incollection{HupferReitzelGrueneberg, author = {Hupfer, Michael and Reitzel, K. and Gr{\"u}neberg, Bj{\"o}rn}, title = {Methods for measuring internal loading}, series = {Internal Phosphorus Loading in Lakes: Causes, Case Studies, and Management}, booktitle = {Internal Phosphorus Loading in Lakes: Causes, Case Studies, and Management}, editor = {Steinmann, Alan D. and Spears, Bryan M.}, publisher = {J. Ross Publishing}, address = {Chicago}, isbn = {978-1-60427-144-7}, pages = {15 -- 43}, language = {en} }