1. Ahmadjian V (1993) The lichen symbiosis. Wiley, Chichester, 250p
2. Ahmadjian V (2001) Trebouxia: reflections on a perplexing and controversial lichen photobiont. In: Seckbach J (ed) Symbiosis. Mechanisms and model systems. Kluwer Academic Publishers, Dordrecht, pp 373–383
3. Archibald PA (1977) Physiological characteristics of Trebouxia (Chlorophyceae, Chlorococcales) and Pseudotrebouxia (Chlorophyceae, Chlorosarcinales). Phycologia 16:295–300
4. Ascaso C, Brown HD, Rapsch S (1988) The effect of desiccation on pyrenoid structure in the oceanic lichen Parmelia laevigata. Lichenologist 20:31–39
5. Aubert S, Juge C, Boisson AM, Gout E, Bligny R (2007) Metabolic processes sustaining the reviviscence of lichen Xanthoria elegans (Link) in high mountain environments. Planta 226:1287–1297