M. Sulkinoja

Leaf fluctuating asymmetry increases with hybridization and elevation in tree-line birches

B. Wilsey, J. Koricheva, E. Haukioja, 1998 .

Biogeographic Evidence for the Evolution of Chemical Defense by Boreal Birch and Willow Against Mammalian Browsing

J. Bryant, R. Julkunen‐Tiitto, J. Tahvanainen, 1989, The American Naturalist.

Bud Demography of the Mountain Birch Betula Pubescens Ssp. Tortuosa Near Tree Line

J. Tuomi, K. Lehtilä, M. Sulkinoja, 1994 .