KERSHAW, John A. - MAGUIRE, Douglas A. Influence of vertical foliage structure on the distribution of stem cross-sectional area increment in western hemlock and balsam fir. In Forest science : quarterly journal of research and technical progress. - Society of American Foresters : Bethesda. ISSN 0015-749X, 2000, vol. 46, no. 1, s. 86-94.