{{Cite conference| last1 = Seidl| first1 = M.| last2 = Perucca| first2 = F.| last3 = Bouhmad| first3 = K.| last4 = Knauer| first4 = S.| last5 = Bontempo| first5 = V.| last6 = de Oliveira| first6 = N.| title = Social compliance for waste water treatment in urban areas of Belo Horizonte (Brazil)| location = Cali, Colombie| date = 2007}}