References
Järvinen, P., A. Palmé, L. Orlando Morales, M. Lännenpää, M. Keinänen, T. Sopanen, and M. Lascoux. 2004. Phylogenetic relationships of Betula species (Betulaceae) based on nuclear ADH and chloroplast matK sequences. Amer. J. Bot. 91: 1834-1845. Google Scholar