Piercey-Normore, Michele D. The lichen-forming ascomycete Evernia mesomorpha associates with multiple genotypes of Trebouxia jamesii. New Phytologist (Wiley). 2005-10-31, 169 (2): 331–344. ISSN 0028-646X. doi:10.1111/j.1469-8137.2005.01576.x.
Piercey-Normore, Michele D. The lichen-forming ascomycete Evernia mesomorpha associates with multiple genotypes of Trebouxia jamesii. New Phytologist (Wiley). 2005-10-31, 169 (2): 331–344. ISSN 0028-646X. doi:10.1111/j.1469-8137.2005.01576.x.