1. Anonymous (2003a) Mutualism: lecture 11 outline. Entomology BIOL 4731. http://www.w3.org/TR/REC-html.40
2. Anonymous (2003b) Bees behavior during foraging, Apiary Fact Sheet # 111. http://agf.gov.bc.ca/apiculture/factsheets/111_forage.html
3. Atwood J Jr (1982) How is Paphiopedilum pollinated? Am Orchid Soc Bull 51:1057–1058
4. Austin DF (1997) Dissolution of Ipomoea series Anisomerae (Convolvulaceae). J Torr Bot Soc 124:140–159
5. Ayensu ES (1974) Plant and bat interactions in West Africa. Ann Mo Bot Gard 61:702–727