References from the California Lichen Catalog
- AHTI, T., & S. HAMMER. 2002.
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Cladonia, pp. 131–158,
in T. H. Nash III, B. D. Ryan, C. Gries, & F. Bungartz (eds.), Lichen flora of the Greater Sonoran Desert region, Vol. 1.
Lichens Unlimited, Arizona State University, Tempe.
- BALTZO, D. E. 2002 (2001).
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San Francisco Watershed lichens — a more comprehensive list.
Bulletin of the California Lichen Society 8: 44–56.
Complete references section