P. R. Castro and N. A. Vello, “ Internode growth in soybean (Glycine max cv. Davis) as an Effect of growth regulators ”, An. Esc. Super. Agr. Luiz de Queiroz, vol. 37, no. 2, pp. 689–699, Jan. 1980, doi: 10.1590/S0071-12761980000200007.