1. 1. E. K. Apostolou, and A. G. Yannitsaros (Unpublished data): Allergenic flora of Greece.
2. The volumetric incidence of atmospheric allergens
3. AN AUTOMATIC VOLUMETRIC SPORE TRAP
4. 4. W. R. Solomon, J. M. Sheldon, R. G. Lovell, and K. R. Mathews (1967 ): Aeroallergens. Techniques of air sampling . In: A Manual of clinical allergy, p. 329 , 2nd edn., Philadelphia & London.