1. Sicherheit und Risiko in Fels und Eis;Schubert,1994
2. Sicherheitszuwachs durch zwei parallele Seile;Feyrer;Fördern und Heben,1989
3. Mountaineering equipment – dynamic mountaineering ropes – safety requirements and test methods;EN 892:2004,2004
4. 89/686/EEC: Guidelines on the application of Council Directive 89/686/EEC of 21 December 1989 on the approximation of the laws of the member states relating to personal protective equipment; 17 July, 2006.