O. Islam, A. Savin, T. Belous (december 2006). »Prut River Basin Management - Case Study«(PDF). Centre for Environmentally Sustainable Economic Policy. str. 15.{{navedi splet}}: Vzdrževanje CS1: samodejni prevod datuma (povezava) Vzdrževanje CS1: uporablja parameter authors (povezava)
"Danube River Basin District, Part A - Roof Report"[1]Arhivirano 2016-10-06 na Wayback Machine. (PDF). ICPDR. April 2004. p. 12.