1. ASTM D. 1760–83: Standard specification for pressure treatment of timber products
2. A. W. P. A.: C4-81 (poles), C5-81 (fence posts), C16-82 (wood used in farms) preservative treatment by pressure processes
3. Bergman, O. 1973: Factors affecting the permeability of softwoods. A literature study. Dapporter, Institutionen for Virkesiara, No 89
4. Blew, J.; Roth, H.; Davidson H. 1967: Preservative retention and distribution in several Western conifers A.W.P.A. 67
5. Bolton, A. J.; Petty, J. A. 1975: Structural components influencing the permeability of ponded and unponded sitca spruce. Microscopy 104: 33–46