Absil, P.

M. Brugge, ter et al., 1993. Household water use and municipal waste water discharges along the Danube : actions for the municipalities Giurgiu and Vidin, (Study report / UBM no. 1993/4) Amsterdam, The Netherlands: Free University Amsterdam, Institute for Environmental Studies. Available at: https://es.ircwash.org/sites/default/files/821-EUREAST93-11047.pdf.