1. The Lichen Symbiosis;Ahmadjian,1967
2. Sulphur dioxide and respiration in lichens;Baddeley,1973
3. δ13C of lichens as environmental monitors;Batts,1996
4. Carbon isotope discrimination in structural and non-structural carbohydrates in relation to productivity and adaption to unfavourable conditions;Brugnoli,1998
5. Bureau of Meteorology, 1999. http://www.bom.gov.au/climate/averages/tables/cw-063224.shtml accessed 5 and 6 October 1999.