L.  Myllys, Velmala, S., Lindgren, H., Glavich, D., Carlberg, T., Wang, L. -s., and Goward, T., ?Taxonomic delimitation of the genera Bryoria and Sulcaria, with a new combination Sulcaria spiralifera introduced?, Lichenologist, vol. 46, pp. 737-752, 2014.