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{{Cite conference| pages = 1499–1506| last1 = Robert| first1 = P.| last2 = Gromaire| first2 = Marie-Christine| last3 = De Gouvello| first3 = Bernard| last4 = Chebbo| first4 = G.| title = Typology of roofing materials and evaluation of their pollutant potential| booktitle = 6th International Conference on Sustainable Techniques and Strategies in Urban Water Management (Novatech 2007)| location = Lyon, France| date = 2007}}