Ferreira, Jorge H., et al. “ Effects of Biuret on Sweet Sorghum (Sorghum Bicolor L.) (Moench) Evaluated by the Development of Plant ”. Anais Da Escola Superior De Agricultura Luiz De Queiroz, vol. 43, no. 2, Jan. 1986, pp. 643-69, https://doi.org/10.1590/S0071-12761986000200015.