1. W.C. Lewis, Design Considerations for Fatigue in Timber Structures, Proceedings of the Committee on Timber, American Society of Civil Engineers 86, No. ST5, (1960).
2. Design of Wood Aircraft Structures, ANC 18, US Dept. of Defense Munitions Board-Aircraft Committee, (1951).
3. C. Holzapfel,Turning and Mechanical Manipulation, Publ. Unknown (1866).
4. H. Noerdlinger,Les Bois employés duns l'Industrie (1872) and Die technischen Eigenschaften d. Hoelzer, (1859).
5. Herbin de Halle, Les Bois propres au Services des Arsenaux (ca. 1815).