Nakatsubo, T., Fujiyoshi, M., Yoshitake, S., Koizumi, H., & Uchida, M. (2010). Colonization of the polar willow Salix polaris on the early stage of succession after glacier retreat in the High Arctic, Ny-Ă…lesund, Svalbard. Polar Research, 29(3), 285-390. https://doi.org/10.3402/polar.v29i3.6078