1. Starch in angiosperm grains and its evolutionary significance;Baker;Amer. J. Bot.,1979
2. Baker H. G. and Baker I. (1983) Some evolutionary and taxonomic implications of variation in the chemical reserves of pollen. In: Pollen: Biology and Implications for Plant Breeding, (Eds Mulcahy D. L. and Ottaviano E.), pp. 43–52. Elsevier Sci., New York.
3. Bancroft J. D. and Stevens A. (1977) Theory and Practice of Histological Techniques. Churchill Livingstone, Edinburgh.
4. A look at honey bee gut functions;Barker;Amer. Bee J.,1972
5. Some carbohydrates found in pollen and pollen substitutes are toxic to honey bees;Barker;J. Nutr.,1977