1. Åstrand, E. 1996. Automatic inspection of sawn wood, pp. 67–88. Linköpings Studies in Science and Technology. Dissertation No. 424, Linköping Univ. ISBN 91-7871-693-4.
2. Aune, J. 1995. An X-ray log-scanner for sawmills.InLindgren, O. (ed.). Proceedings of the 2nd International Workshop on Scanning Technology and Image Processing on Wood, pp. 51–64. Technical Report 1995:22 T. Lulea Univ. of Technology, Skellefteå. ISSN 0349-3571.
3. Baetty, R., Choffel, D. & Charpentier, P. 1999. Towards products tracking into wood industries.InChoffe, D. (ed.). Proceedings of the 14th International Wood Machining Seminar, Epinal, France, 12–19 Sept. 1999, pp. 325–334. ENSTIB–French National School of Wood Technology.
4. Bahar, S. 1991. Algorithms for log recognition. Master Thesis. MT-23/1991, Gävle Univ., Gävle, Sweden.
5. Becker, G. 2001. Precision forestry in Central Europe – new perspectives for a classical management concept.InProceedings of the First International Precision Forestry Cooperative Symposium. University of Washington, College of Forest Resources, Seattle, WA, 17–20 June 2001.