Faccini, Delma E., and Luisa A. Nisensohn. “Amaranthus Quitensis Population Dynamics. Influence of Chemical and Mechanical Treatments in a Soybean Crop”. Pesquisa Agropecuaria Brasileira, vol. 29, no. 7, July 1994, pp. 1041-50, https://doi.org/10.1590/S1678-3921.pab1994.v29.4146.