by Nyquist, B., Tyson, R., Larsen, K.
Published in Bulletin of mathematical biology (01.05.2007)

by Green, Laura, Duguid, Marlyse
Published in Rhodora (01.04.2020)

by Outerbridge, R.A, Trofymow, J.A
Published in Canadian journal of botany (01.11.2004)

by Pérez, C.A., Carmona, M.R., Armesto, J.J.
Published in Gayana. Botánica. (2003)

Published in The Vancouver sun (1986) (21.09.1993)

by C.A. Pérez, M.R. Carmona, J.J. Armesto
Published in Gayana. Botánica. (01.01.2003)

by Wilson, Derek
Published in Coquitlam now (13.04.2005)

by Jenkins, D.H, Devlin, D.A, Johnson, N.C, Orndorff, S.P
Published in Journal of forestry (01.04.2004)