Chaim, Aldemir. “A Pneumatic-Electrostatic Nozzle to Produce Droplets With High Level Charge”. Pesquisa Agropecuaria Brasileira, vol. 33, no. 4, Apr. 1998, pp. 463-70, https://doi.org/10.1590/S1678-3921.pab1998.v33.4869.