LÊ, T. T.; DƯƠNG THỊ, H. H. Exploiting arithmetical properties related to numeral mathematical problems in student olympic exams. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, [S. l.], v. 6, n. 16, p. 110–115, 2021. DOI: 10.51453/2354-1431/2020/333. Disponível em: https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/333. Acesso em: 2 may. 2024.