1. The Biology of Lichens;Hale,1974
2. Determination of baseline element composition of lichens using samples from high elevations;Bergamaschi;Chemosphere,2004
3. Differential interception and evaporation of fog, dew and water vapour and elemental accumulation by lichens explain their relative abundance in a coastal desert;Maphangwa;J. Arid Environ,2012
4. J.E. Sloof, M. de Bruin, H. Wolterbeek, Critical evaluation of some commonly used biological monitors for havy metal air pollution, in: Environmental Contamination: Proceedings of the international Conference Venice (Italy), Edinburgh, 1988, pp. 296–298.
5. Lichens as bioindicators of heavy metal pollution: a case study at La Spezzia (Italy);Nimis,1993