REN, Shingsui Eric; HE, Yuanyi; HE, Jiacheng; CHENG, Yuhao. The Investigation of 15-puzzle, Varikon Boxes, and Similar Variants. Science and Technology of Engineering, Chemistry and Environmental Protection, [S. l.], v. 3, n. 3, p. 8812, 2025. DOI: 10.61173/2z34j345. Disponível em: https://stecep.deanfrancis.press/article/view/952. Acesso em: 4 nov. 2026.