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2. 50 years of snow profiles on the Weissfluhjoch and relations to the surrounding avalanche activity (1936/37–1985/86);deQuervain;IAHS Publ.,1987
3. Ferguson, S.A. 1984. The role of snowpack structure in avalanching. Ph.D. Thesis, University of Washington, Seattle WA, USA, 150 pp.
4. Characteristics of weak snow layers or interfaces;Föhn,1993
5. Mechanical and structural properties of weak layers measured in situ;Föhn;Ann. Glaciol.,1998