1. Güvenç Ş, Bilgin A, Bayrak K, Yümün ZÜ, Kam E, Yasemin S, Karaca M (2018) Which is the better as an indicator of environmental quality: Parmelia sulcata Taylor or Parmelina tiliacea (Hoffm) Hale. J Biol Environ Sci 12(34):1–6
2. Rai AN (1988) Nitrogen metabolism. In: Galun M (ed) CRC handbook of lichenology, vol I. CRC Press, Boca Raton, pp 201–237
3. Nash TH (ed) (1996) Lichen biology. Cambridge University Press
4. Aslan A, Yazici K (2006) Contribution to the lichen flora of Giresun province of Turkey. Acta Bot Hungar 48(3–4):231–245
5. Hale ME, Ocampo-Friedmann R (1984) Ascospore cultures of lichen phycobionts from the Antarctic desert. Antarct J US 19:170