VIRKO, V. F.; VIRKO, Y. V. Influence of Nonuniform Magnetic Field on the Helicon Discharge Excited by Various Antennas. Ukrainian Journal of Physics, [S. l.], v. 64, n. 3, p. 223, 2019. DOI: 10.15407/ujpe64.3.223. Disponível em: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018120. Acesso em: 27 nov. 2020.