organised by the Directorate of the Environment and Local Authorities of the Council of Europe, in association with the Ministry for the Protection of the Environment and Natural Resources, Russian Federation ; Pouchtchino Research Centre, Moscow Region (Russian Federation), 7-9 September 1995
organised by the Council of Europe (Directorate of Environment and Local Authorities) and the Slovenian Ministry of the Environment and Physical Planning, Maribor (Sovenia), 12-14 September 1996