ALMAHDI MOHAMMED MULLA, AMAL MOHAMMED AHMED GAWEASH, HAYAT YOUSUF ISMAIL BAKUR, Mariam. Arithmetic Subgroups and Applications. Global Journal of Science Frontier Research, [S.l.], sep. 2020. ISSN 2249-4626. Available at: <https://journalofscience.org/index.php/GJSFR/article/view/2783>. Date accessed: 15 apr. 2021.