References from the California Lichen Catalog

BUNGARTZ, F., T. H. NASH III, & B. D. RYAN. 2004.

Morphology and anatomy of chasmolithic growth: a taxonomic revision of inconspicuous saxicolous Buellia species generally ascribed to the B. punctata group from the Sonoran Desert region. Canadian Journal of Botany 82: 540–562.