1. Baker HG, Baker I (1983) A brief historical review of the chemistry of floral nectar. In: Bentley B, Elıas T (eds) The biology of nectaries. Columbia University Press, New York, pp. 126–152.
2. Über die Zusammensetzung des Nektars und den Mechanismus seiner Sekretion;U Lüttge;Planta,1961
3. Non-sugar chemical constituents of nectar;HG Baker;Apidologie,1977
4. A novel role for proline in plant floral nectars;C Carter;Naturwissenschaften,2006
5. Baker HG, Baker I (1983) Floral nectar constituents in relation to pollinator type. In: Jones CE, Little RJ (eds)Handbook of experimental pollination biology. Scientific and Academic Editions, New York, pp. 117–141.