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N. P.  Barker, Clark, L. G., Davis, J. I., Duvall, M. R., Guala, G. F., Hsiao, C., Kellogg, E. A., H. Linder, P., Mason-Gamer, R. J., Matthews, S., Soreng, R. J., and Spangler, R., ?A Phylogeny of the Grass Family (Poaceae), as inferred from eight character sets?, in Grasses, Systematics and Evolution, S. W. L.  Jacobs and Everett, J., Eds. Collingwood: CSIRO Publishing, 2000, pp. 3-7.