KUMAR, Mahesh; M, Sindhu; SETHUMADHAVAN, M; K V, Lakshmy. Distributed Human Interaction Proof for Public Blockchain Platform. International Journal of Engineering and Technology, [S. l.], v. 7, n. 3.34, p. 885–889, 2018. DOI: 10.14419/ijet.v7i3.34.19582. Disponível em: https://mail.sciencepubco.com/index.php/IJET/article/view/19582.. Acesso em: 17 aug. 2025.