1. Ahmadjian V (1987) Ann New York Acad Sci 503:307–315
2. Ahmadjian V (1993) The Lichen Symbiosis. John Wiley&Sons, New York, pp 56–58
3. Ahmadjian V (1995) In: Kohmoto K, Singh US, Singh RP (eds) Pathogenesis and Host Specificity in Plant Diseases. II. Eukaryotes. Pergamon, Oxford, pp 277–288
4. Birecka H, Ireton KP, Bitonti AJ, McCann PP (1991) Phytochemistry 30: 105–108
5. Bubrick P (1988) In: Galun M (ed) Handbook of Lichenology, II. CRC Press, Boca Raton, pp 133–144