Insect-Plant Interactions, Vol. CRC Press, pp. Non-mutualistic yucca moths and their evolutionary consequences. Bruneau, A. 1997. Hodges, S.A. 1997.
Floral nectar spurs and diversification.
Switch from specialized to generalized pollination. Chapter 2, pp. Nilsson, L.A. 1988. The evolution of flowers with deep corolla tubes . Chapter 2, pp.