de los Rios, Asunción; Ascaso, Carmen; Grube, Martin. "Infection mechanisms of lichenicolous fungi studied by various microscopic techniques". In Llimona, X.; Lumbsch, H. T.; Ott, S. (eds.). Progress and Problems in Lichenology at the Turn of the Millenium(PDF). Bibliotheca Lichenologica. Vol. 82. pp. 153–161.
doi.org
Myllys, Leena; Lohtander, Katileena; Tehler, Anders (Mar–Apr 2001). "β-Tubulin, ITS and Group I Intron Sequences Challenge the Species Pair Concept in Physcia aipolia and P. caesia". Mycologia. 93 (2): 335–343. doi:10.1080/00275514.2001.12063165. JSTOR3761655. S2CID196621949.
Peard, Janet L. (August 1983). "Distribution of Corticolous Noncrustose Lichens on Trunks of Rocky Mountain Junipers in Boulder County, Colorado". The Bryologist. 86 (3): 244–250. doi:10.2307/3242712. JSTOR3242712.
Nash, III, T. H.; White, S. L.; Marsh, J. E. (Autumn 1977). "Lichen and Moss Distribution and Biomass in Hot Desert Ecosystems". The Bryologist. 80 (3): 470–479. doi:10.2307/3242022. JSTOR3242022.
Nash III, Thomas H. (Oct 1974). "Lichens of the Page Environs as Potential Indicators of Air Pollution". Journal of the Arizona Academy of Science. 9 (3): 97–101. doi:10.2307/40023608. JSTOR40023608.
Jovan, Sarah; McCune, Bruce (Oct 2005). "Air-Quality Bioindication in the Greater Central Valley of California, with Epiphytic Macrolichen Communities". Ecological Applications. 15 (5): 1712–1726. doi:10.1890/03-5368. JSTOR4543475.
Myllys, Leena; Lohtander, Katileena; Tehler, Anders (Mar–Apr 2001). "β-Tubulin, ITS and Group I Intron Sequences Challenge the Species Pair Concept in Physcia aipolia and P. caesia". Mycologia. 93 (2): 335–343. doi:10.1080/00275514.2001.12063165. JSTOR3761655. S2CID196621949.
Peard, Janet L. (August 1983). "Distribution of Corticolous Noncrustose Lichens on Trunks of Rocky Mountain Junipers in Boulder County, Colorado". The Bryologist. 86 (3): 244–250. doi:10.2307/3242712. JSTOR3242712.
Nash, III, T. H.; White, S. L.; Marsh, J. E. (Autumn 1977). "Lichen and Moss Distribution and Biomass in Hot Desert Ecosystems". The Bryologist. 80 (3): 470–479. doi:10.2307/3242022. JSTOR3242022.
Rusinska, Anna; Balcerkiewicz, Stanislaw (June 1978). "Moss Communities of the roofs of buildings". Abstracta Botanica. 5 (Supplementum 3): 51–60. JSTOR43519036.
Nash III, Thomas H. (Oct 1974). "Lichens of the Page Environs as Potential Indicators of Air Pollution". Journal of the Arizona Academy of Science. 9 (3): 97–101. doi:10.2307/40023608. JSTOR40023608.
Jovan, Sarah; McCune, Bruce (Oct 2005). "Air-Quality Bioindication in the Greater Central Valley of California, with Epiphytic Macrolichen Communities". Ecological Applications. 15 (5): 1712–1726. doi:10.1890/03-5368. JSTOR4543475.
lichenportal.org
"Physcia caesia". lichenportal.org. Consortium of North American Lichen Herbaria. Retrieved 11 July 2017.
Myllys, Leena; Lohtander, Katileena; Tehler, Anders (Mar–Apr 2001). "β-Tubulin, ITS and Group I Intron Sequences Challenge the Species Pair Concept in Physcia aipolia and P. caesia". Mycologia. 93 (2): 335–343. doi:10.1080/00275514.2001.12063165. JSTOR3761655. S2CID196621949.