References

Mikhailova, I.N.,  Vorobeichik, E.L. (1999): Dimensional and age structure of populations of epiphytic lichen Hypogymnia physodes (L.) Nyl. under conditions of atmospheric pollution. Russian Journal of Ecology 30(2): 111-118

van Herk, C. M. (1999): Mapping of Ammonia pollution with epiphytic lichens in the Netherlands. Lichenologist 31: 9-20

Wirth, V. (1991): Zeigerwerte von Flechten. In: Zeigerwerte von Pflanzen in Mitteleuropa (Eds: Ellenberg, H., Weber, H.E., Düll, R., Wirth, V., Werner, W., Paulissen, D.). Scripta Geobotanica 18: 215-237

Insarov, G.E., Semenov, S.M., Insarova, I.D. (1999): A system to monitor climate change with epilithic lichens. Environmental Monitoring and Assessment 55: 279-298

De Sloover, J., LeBlanc, F. (1968): Mapping of atmospheric pollution on the basis of lichen sensitivity. In: Proceedings of the Symposium in Recent Advances in Tropical Ecology. (Ed: R. Misra & B. Gopal) International Society for Tropical Ecology, Banaras Hindu University, Varansi: 42-56

Herzig, R., Liebendörfer, L., Urech, M. (1987): Flechten als Bioindikatoren der Luftverschmutzung in der Schweiz: Methoden-Evaluation und Eichung mit wichtigen Luftschadstoffen. VDI Berichte 609: 619-639

Loppi, S., Giordani, P., Brunialti, G., Isocrono, D., Piervittori, R. (2001): A new scale for the interpretation of lichen biodiversity values in the Thyrrenian side of Italy. Bibl. Lichenol., in press

Trass, H. (1973): Lichen sensitivity to air pollution and index of poleotolerance (I.P.). Folia Cryptog. Estonica 3: 19-22

Van Haluwyn, C., Lerond, M. (1988): Lichenosociologie et qualite de l'air: Protocole operatoire et limites. Cryptogamie, Bryologie et Lichenologie 9(4): 313-336


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