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M. E.  Barkworth, Arriaga, M. O., Smith, J. F., Jacobs, S. W. L., J. Reyna, V., and Bushman, B. S., ?Molecules and Morphology in South American Stipeae (Poaceae)?, Systematic Botany, vol. 33, pp. 719-731, 2008.

M. E.  Barkworth, Jacobs, S. W. L., and Connor, H. E., ?The Triticeae in Australasia?, in 4th International Conference: The Comparative Biology of the Monocotyledons: 5th International Symposium: Grass Systematics and Evolution, Copenhagen: Monocots IV Copenhagen, 2008, p. 8.