HAERTEL, Hermann. Voltage and Surface Charges. European Journal of Physics Education, [S.l.], v. 12, n. 3, p. 19-31, aug. 2021. ISSN 1309-7202. Available at: <http://eu-journal.org/index.php/EJPE/article/view/317>. Date accessed: 18 sep. 2021. doi: https://doi.org/10.20308/ejpe.v12i3.317.