1. Common Cause for Nature: Values and Frames in Conservation,2013
2. First International Snow Leopard Conference, 7–8 March 1978, Helsinki. Proceedings Published in International Pedigree Book of Snow Leopards, Panthera uncia,1978
3. Second International Snow Leopard Conference, 9–10 October 1980, Zurich Zoo. Proceedings Published in International Pedigree Book of Snow Leopards, Panthera uncia,1980
4. Third International Snow Leopard Symposium, 22–25 June, 1982, Woodland Park Zoo, Seattle. Proceedings Published in International Pedigree Book of Snow Leopards, Panthera uncia,1982
5. Forth International Snow Leopard Symposium, 20–21 September 1984, Krefeld Zoo, West Germany,1984