Population dynamics of Digitaria spp submitted to selection pressure by herbicides in sugarcane crop - Dias, N. M. P.; Pereira, M. R. D. B.; Lopez Ovejero, R. F.; Christoffoleti, Pedro Jacob; Barela, J. F.; Tornisielo, Valdemar Luiz (Journal of Environmetal Science and Health. Part B, 2005)