Proposing a Scheme for Human Interactive Proof Test using Plasma Effect. Baghdad Science Journal, Iraq, Baghdad, v. 16, n. 2, p. 0409, 2019. DOI: 10.21123/bsj.2019.16.2.0409. Disponível em: https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/3478.. Acesso em: 18 jun. 2025.