1. Barnes, S. H., Blackmore, S., 1984: Freeze fracture and cytoplasmic maceration in botanical scanning electron microscopy. ? J. Microscopy136: RP3?4.
2. Dahl, A. O., Rowley, J. R., 1991: Microspore development inCalluna (Ericaceae). Exine formation. ? Ann. Sci. Nat. Bot. Paris13, 11: 155?176.
3. Dickinson, H. G., 1976a: The deposition of acetolysis-resistant polymers during the formation of pollen. ? Pollen & Spores18: 321?334.
4. , 1976b: Common factors in exine deposition. ? InFerguson, I. K., Muller, J., (Eds): The evolutionary significance of the exine, pp. 67?83. ? London: Academic Press.
5. , 1982: The development of pollen. ? Rev. Cytol. Biol. Veg. Bot.5: 5?19.