1. Ashley, R.M. and M.A. Verbanck (1998), Physical processes in sewers, Proceedings from Congress on Water Management in Conurbations, Bottrop, Germany, June19-20,1997, pp.26-47.
2. Ashley, R.M., J.L. Bertrand-Krajewski, T. Hvitved-Jacobsen, and M. Verbanck(eds.)(2004), Solids in Sewers, IWA Scientific and Technical Report No. 14, International Water Association Publishing, London, p. 340.