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- â FÊgri, K and L van der Pijl(1979). The principles of pollination ecology. Oxford: Pergamon.
- â Fulton, M and SA Hodges(1999). "Floral isolation between Aquilegia formosa and A. pubescens". Proceedings of the Royal Society of London, Series B 266: 2247â2252.
- â Hodges SA, JB Whittall, M Fulton and JY Yang(2002). "Genetics of floral traits influencing reproductive isolation between Aquilegia formosa and A. pubescens". American Naturalist 159: S51âS60.
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- â Tan, KH and R Nishida(2005). "Synomone or Kairomone? - Bulbophyllum apertum (Orchidaceae) flower releases raspberry ketone to attract Bactrocera fruit flies". Journal of Chemical Ecology 31(3): 509-519.
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