Uchida M., Nakatsubo T., Kanda H., and Koizumi H. “Estimation of the Annual Primary Production of the Lichen Cetrariella Delisei in a Glacier Foreland in the High Arctic, Ny-Ålesund, Svalbard”. Polar Research, vol. 25, no. 1, Jan. 2006, pp. 39-49, doi:10.3402/polar.v25i1.6237.