1. Baker, H. G., 1978: Chemical aspects of the pollination biology of woody plants in the tropics. ? InTomlinson, P. B., Zimmermann, M. H., (Eds): Tropical trees as living systems, pp. 57?82. ? Cambridge: Cambridge University Press.
2. , 1973: Some anthecological aspects of the evolution of nectar-producing flowers, particularly amino acid production in nectar. ? InHeywood, V. H., (Ed.): Taxonomy and ecology, pp. 243?264. ? London: Academic Press.
3. , 1977: Intraspecific constancy of floral nectar amino acid complements. ? Bot. Gaz.138: 183?191.
4. , 1986: The occurrence and significance of amino acids in floral nectar. ? Pl. Syst. Evol.151: 175?186.
5. Belmonte, E., Cardemil, L., Kalin Arroyo, M. J., 1994: Floral nectary structure and nectar composition inEccremocarpus scaber (Bignoniaceae), a hummingbird-pollinated plant of central Chile. ? Amer. J. Bot.81: 493?503.