1. Baillon, H., 1895: Histoire des Plants, vol. 13, Monographie de Pandanac�es, Cyclanthac�es, et Arac�es. ? Paris, France: Libraire Hachette.
2. Baker, H. G., Harris, J. J., 1957: The pollination ofParkia by bats and its attendant evolutionary problems. ? Evolution11, 449?460.
3. ?, 1971: Minor parasitism in pollination biology and its community function: the case ofCeiba acuminata. ? Bioscience21, 1127?1129.
4. ?, 1982: Floral nectar constituents in relations to pollinator type. ? InJones, C. E., Lille, R. J., (Eds.): Handbook of Experimental Pollination Biology. ? New York: Van Nostrand-Reinhold.
5. Baker, I., 1979: Method for the determination of volumes and sugar concentrations from nectar spots on paper. ? Phytochem. Bull.12, 40?42.