Case J.W. Lichen biomonitoring network in Alberta // Environ. monitoring and assessment. - 1984. - 4. - N3. - C.303-306.
Galun M., Garty S., Ronen R. Lichen as bioindicators of air pollution // Weblia,1984.-38.-C.371-383.
Grodzinska Kristina, Godzik Barbara, Szarek Grazina. Heavy metals and sulphur in lichens from southern Spitsbergen // Fragm. Florist. Et geobot.-1993.- Suppl.2\2.- C.699-708.
Hartman Z., Reznicek J. Vanad v rostlinach pri indikaci znecisteni ropnymi uhlovodicu // Pamatky a priroda,1986. - V.11. - N10. - C.614-616.
Martin Juri, Noble Reinold, Scwab Danie. Lichen and moss surface analysis using scanning electron microscopy and energy dispersive x-ray spectroskopy // Proc. Ect. Acad.Sci. Ecol. - 1992. - 2. - N3. - С.81-92.
Nash T.H., Gries C. The responce of lichens to atmospheric deposition with the emphasis on the Arctic. [Pap.] Int. Symp.Ecol. Ef. Arct. Airborne Contam. Reykjavik, 4-8 Oct.,1993. // Sci. Total. Environ. - 1995. - 160-161. - C.737-747.