{{Cite conference| last1 = Zgheib| first1 = S.| last2 = Gromaire| first2 = Marie-Christine| last3 = Lorgeoux| first3 = C.| last4 = Saad| first4 = M.| last5 = Chebbo| first5 = G.| title = Sterols: a tracer of the origin of organic matter in combined sewers| booktitle = 5th International Conference on Sewer Processes and Networks| location = Delft, Netherlands| date = 2007}}