1. Lecanora conizaeoides in Iceland;Bailey;Lichenologist,1968
2. Flechtenvereine der Stadte, Stadt-Flechten und ihr Wachstum;Beschel;Veröff. Naturw. Med. Ver. Innsbruck,1958
3. The distribution of the lichen Lecanora conizaeoides Cromb. in North Ireland;Brightman;Ir. Nat. J.,1964
4. Lichen growth and cities; a study on Long Island, New York;Brodo;Bryologist,1966
5. Lichens as indicators of atmospheric pollution;Fenton;Ir. Nat. J.,1960