Aparecido Cardoso, João Antonio, Felipe Takeshi Ishizu, Jeferson Tadeu de Lima, and Jefferson de Souza Pinto. “Blockchain Based MFA Solution: The Use of Hydro Raindrop MFA for Information Security on WordPress Websites”. Brazilian Journal of Operations & Production Management 16, no. 2 (May 26, 2019): 281–293. Accessed November 27, 2021. https://bjopm.emnuvens.com.br/bjopm/article/view/791.