PAN, Hongjun. The Art of Spirals. European Journal of Applied Sciences, [S. l.], v. 10, n. 6, p. 109–120, 2022. DOI: 10.14738/aivp.106.13388. Disponível em: https://scholarpublishing.org/journals/index.php/EJAS/article/view/8427. Acesso em: 30 may. 2026.