Kenta, Hiroshi, Yamato Shino, Dewi Immaniar, Eka Purnama Harahap, and Alfian Dimas Ahsanul Rizki Ahmad. “(Retracted) Gamification Based Blockchain Tournaments Between Miners”. Aptisi Transactions on Technopreneurship (ATT) 3, no. 1 (March 31, 2021): 91–114. Accessed September 12, 2025. https://att.aptisi.or.id/index.php/att/article/view/144.