Gomes de Sousa, S.F. et al. 2017. COMPARISON OF THREE-LED AND FOUR-LED SEED SENSOR TECHNOLOGIES FOR MONITORING CORN, SOYBEANS, AND SORGHUM SOWING. ENERGIA NA AGRICULTURA. 32, 1 (jun. 2017), 8–11. DOI:https://doi.org/10.17224/EnergAgric.2017v32n1p8-11.