L.  Arvidsson and Galloway, D. J., ?The lichen genus Coccocarpia in New Zealand?, Botaniska Notiser, vol. 132, pp. 239-246, 1979.

T. J.  Moser, Nash_, III, T. H., and Thomson, J. W., ?Lichens of Anaktuvuk Pass, Alaska, with emphasis on the impact of caribou grazing?, The Bryologist, vol. 82, pp. 393-408, 1979.

J. W.  Thomson, Lichens of the Alaskan Arctic Slope. Toronto: University of Toronto Press, 1979, p. 314.