Erkki Verkasalo (Research Professor, LUKE) has modified and updated the text from the reference “Hakkila, P and Verkasalo, E. 2009. Structure and properties of wood and woody biomass. In: Kellomäki, S. (Ed.). Forest Resources and Sustainable Management. 2nd edition. Paper Engineers’ Association, Helsinki, Finland. pp. 133-215”.
References:
Pettersen, R. C. 1984. The chemical composition of wood. Chapter 2 in: Rowell, R. M. (ed.). The chemistry of solid wood. American Chemistry Society, Advances in Chemistry Series, Volume 207. Washington. 614 p. ISBN 0-841-20796-8.
Hannus, K., Pensar, G. 1970. Extraktivämnen i barr Extractives in needles. Åbo Akademi, Institut för Träkemi, Cellulosateknik B44. 41 p.
Hakkila, P., Kalaja, H. 1983. Puu- ja kuorituhkan palauttamisen tekniikka. Summary: The technique of recycling wood and bark ash. Folia Forestalia 552. 37 p. ISBN 951-40-0612-7. ISSN 0015-5543.
