Mwalungali, Boyd, and William Sakala. “The Structure Theorems for Infinite Abelian Groups”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 59, no. 2 (August 11, 2021): 279–303. Accessed May 2, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/12848.