L.  Watson, Clifford, H. T., and Dallwitz, M., ?The classification of Poaceae, subfamilies and supertribes?, Australian Journal of Botany, vol. 33, pp. 433-484, 1985.

H. T.  Clifford and Goodall, D. W., ?A numerical contribution to the classification of the Poaceae?, Australian Journal of Botany, vol. 15, pp. 499-516, 1967.

H. T.  Clifford, Williams, W. T., and Lance, G. N., ?A further numerical contribution to the classification of the Poaceae?, Australian Journal of Botany, vol. 17, pp. 119-131, 1969.