1. Theory of the Compression Hysteresis of Fibrous Assemblies
2. Hahn, G.J., and Shapiro, S.S. "Statistical Models in Engineering," John Wiley & Sons, Inc., NY, 1967, p. 42.
3. Kallmes, O., A Comprehensive View of the Structure of Paper, in " Theory and Design of Wood and Fiber Composite Materials," B. A. Jayne, Ed. Syracuse University Press, NY, 1972, p. 157.
4. Numbers of Fiber-to-Fiber Contacts in General Fiber Assemblies