Mateus, G. P., Crusciol, C. A. C. and Negrisoli, E. (2004) “Gigantic guinea sorghum straw on the weed establishment in a no-tillage area”, Pesquisa Agropecuaria Brasileira, 39(6), pp. 539–542. doi: 10.1590/S1678-3921.pab2004.v39.6805.