D. H. S.  Richardson, D. Hill, J., and Smith, D. C., ?Lichen Physiology. XI. The Role of the Alga in Determining the Pattern of Carbohydrate Movement Between Lichen Symbionts?, New Phytologist, vol. 67, pp. 469-486, 1968.

J. W.  Thomson_, Jr., ?The species of Peltigera of North America north of Mexico?, American Midland Naturalist, vol. 44, pp. 1-68, 1950.

W. A.  Leighton, ?Lichenological memorabilia, No. 7 - Additions to the Lichen-Flora of Great-Britain etc. - On the characters of Peltigera canina, P. malacea and P. rufescens?, 1875.

C. J. B.  Hitch and Millbank, J. W., ?Nitrogen Metabolism in Lichens. VII. Nitrogenase Activity and Heterocyst Frequency in Lichens with Blue-Green Phycobionts?, New Phytologist, vol. 75, pp. 239-244, 1975.

H.  Kristinsson, ?The lichen flora of the outer Hvalfjördur area in West Iceland?, Acta Botanica Islandica, vol. 8, pp. 31-50, 1985.

O.  Vitikainen, ?Three new species of Peltigera (lichenized Ascomycetes)?, Annales Botanici Fennici, vol. 22, pp. 291-298, 1985.

J. Walter Thomson and Brehmer, B., American Arctic Lichens I. The Macrolichens. Columbia University Press, 1984.

O. W.  Purvis, Moore, D. M., Coppins, B. J., Hawksworth, D. L., and James, P. W., The Lichen Flora of Great Britian and Ireland. London: Natural History Museum Publications, 1992.

J. W.  Thomson and Weber, W. A., ?Lichens Collected on the Arctic Excursion of the 9th International Botanical Congress (Montreal) in 1959?, The Bryologist, vol. 95, pp. 392-405, 1992.

S. S.  Talbot, Talbot, S. Looman, and Thomson, J. W., ?Lichens of Attu Island, Alaska?, The Bryologist, vol. 94, pp. 421-426, 1991.

T. D. V.  Swinscow and Krog, H., Macrolichens of East Africa. Dorchester: Henry Ling Ltd, The Dorset Press, 1988.

J.  Holtan-Hartwig, ?Two New Species of Peltigera?, The Lichenologist, vol. 20, pp. 11-17, 1988.

V. P. W.  Miao, Rabenau, A., and Lee, A., ?Cultural and molecular characterization of photobionts of Peltigera membranacea?, The Lichenologist, vol. 29, pp. 571-586, 1997.

B.  McCune and Geiser, L., Macrolichens of the Pacific Northwest. Corvallis: Oregon State University Press, 1997.

I.  Mart{\'?nez and Burgaz, A., ?Anatomical study of Peltigera canina, P. membrancea and P. praetextata (lichenized Ascomycotina)?, Annales Botanici Fennici, vol. 33, pp. 223-229, 1996.

J. W.  Thomson and Ahti, T., ?Lichens Collected on an Alaska Highway Expedition in Alaska and Canada?, The Bryologist, vol. 97, pp. 138-157, 1994.

P. L.  Nimis, The Lichens of Italy: An annotated catalogue, vol. 12. Torino: , 1993.

V.  Alstrup, Hansen, E. Steen, and Daniels, F. J. A., ?Lichenized, lichenicolous and other fungi from North and North-East Greenland?, Folia Cryptogamica Estonica, vol. 37, pp. 1-20, 2000.

O.  Gilbert, Lichens. London: HarperCollins, 2000, p. 288.

B.  Goffinet and J. a}dlikowska, M. {\k, ? Peltigera phyllidiosa  (Peltigeraceae, Ascomycotina), a New Species from the Southern Appalachians Corroborated by its Sequences?, The Lichenologist, vol. 31, pp. 247-256, 1999.

K.  Yazici, ?Lichen flora of Trabzon [Trabzon ili likenleri]?, Turkish Journal of Botany, vol. 23, pp. 97-112, 1999.

P.  Paulsrud, Rikkinen, J., and Lindbald, P., ?Cyanobiont Specificity in Some Nostoc-Containing Lichens and in a Peltigera aphthosa Photosymbiodeme?, New Phytologist, vol. 139, pp. 517-524, 1998.

K.  Palmqvist, Sancho, L. G., Matsson, J. - E., Dahlman, L., Valladares, F., and Tehler, A., ?CO2 Exchange and Thallus Nitrogen across 75 Contrasting Lichen Associations from Different Climate Zones?, Oecologia, vol. 133, pp. 295-306, 2002.

L.  Zedda, ?The Epiphytic Lichens on Quercus in Sardinia (Italy) and Their Value as Ecological Indicators?, Englera, vol. 24, pp. 3-457, 2002.

I. M.  Brodo, Sharnoff, S. Duran, Laurie-Bourque, S., and Sharnoff, S., Lichens of North America. Yale University Press, 2001.

T.  Goward and Goffinet, B., ?Peltigera chionophila, a New Lichen (Ascomycetes) from the Western Cordillera of North America?, The Bryologist, vol. 103, 2000.

T.  Goward and Arsenault, A., ?Cyanolichens and conifers: implications for global conservation?, For. Snow Landsc. Res., vol. 75, pp. 303-318, 2000.

D. J.  Galloway, ?The lichen genus Peltigera (Peltigerales: Ascomycota) in New Zealand?, Tuhinga, vol. 11, pp. 1-45, 2000.

U.  Arup, Knutsson, T., and Ålind, P., ?The epiphytic lichen flora in Mittlandsskogen, Öland, SE Sweden?, Graphis Scripta, vol. 14, 2003.

P. M.  McCarthy, ?Checklist of the Lichens of Australia and its Island Territories?, Australian Biological Resources Study, Canberra., 2010.

E.  Sérusiaux, Goffinet, B., Miadlikowska, J., and Vitikainen, O., ?Taxonomy, phylogeny and biogeography of the lichen genus Peltigera in Papua New Guinea?, Fungal Diversity, pp. 185-224, 2009.

M. Haji Moniri and Sipman, H. J. M., ?Lichens of two nature reserves in NE Iran?, Willdenowia, vol. 39, pp. 199-202, 2009.

?Index Fungorum [taxonomy information]?, 2008.

T.  H. Lumbsch and Huhndorf, S. M., ?Outline of Ascomycota - 2007. [Classification Information]?, Myconet, vol. 13, pp. 1-58, 2007.

J. W.  Hinds and Hinds, P. L., The Macrolichens of New England, vol. 96. China: The New York Botanical Garden Press, 2007.