1. Minimizing windfall around clear cuttings in spruce–fir forests;Alexander;Forest Sci.,1964
2. Alexander, R.R., 1967. Windfall after clear cutting on Fool Creek. Research Note RM-92. U.S. Forest Service, Rocky Mountain Forest and Range Experiment Station, 11 pp.
3. Amtmann, R., 1986. Dynamische Windbelastung von Nadelbäumen. Forstliche Forschungsberichte München. No. 74, 218 pp.
4. An assessment of the static and dynamic factors involved in windthrow;Blackburn;Forestry,1988
5. Fraser, A.I., Gardiner, J.B.H., 1967. Rooting and stability in Sitka spruce. Forestry Commission Bulletin No. 40. HMSO, London, 28 pp.