1. American Society for Testing and Materials. 1970. Annual Book of AsTM standards part 16. ASTM, Philadelphia.
2. Bach, L. 1965. Non-linear mechanical behavior of wood in longitudinal tension. Ph. D. Dissertation, State University College of Forestry at Syracuse University, Syracuse, N.Y.
3. Inform. Rep. VP-X-14;L. Bach,1967
4. Bhatnagar, N. S., Gupta, R. P. 1967. On the constitutive equations of the orthotropic theory of creep. Wood Sci. Technol. 1: 142?148.
5. Doyle, D. V., McBurney, R. S., Drow, J. T. 1946. The elastic properties of wood. Forest Products Laboratory, Madison, Wisconsin, Mimeo No. 1528-E.