@article {mathys2008occurrence, title = {Occurrence of Legionella in hot water systems of single-family residences in suburbs of two German cities with special reference to solar and district heating}, journal = {International journal of hygiene and environmental health}, volume = {211}, number = {1}, year = {2008}, pages = {179{\textendash}185}, publisher = {Elsevier}, author = {Mathys, Werner and Stanke, Juliane and Harmuth, Margarita and Junge-Mathys, Elisabeth} }