Ruslina, E., D. Hernawan, and T. Rastuti. “Legal Protection for Bitcoin Users in E-Commerce Transactions”. Proceeding Interuniversity Forum for Strengthening Academic Competency, Vol. 1, no. 1, May 2019, pp. 311 -5, https://proceedings.conference.unpas.ac.id/index.php/ifsac/article/view/179.