บ่อคำ ร. ข้อผิดพลาดทางคณิตศาสตร์. Life Sciences and Environment Journal, [S. l.], v. 10, n. 1-2, p. 65–71, 2014. Disponível em: https://ph01.tci-thaijo.org/index.php/psru/article/view/17056. Acesso em: 19 may. 2024.