Ivanov, Sabin, and Klaida Doychinova. “TYPES OF INFORMATION SYSTEMS: TYPES OF INFORMATION SYSTEMS”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 26, no. 1 (November 12, 2024): 5–11. Accessed November 21, 2024. https://jsar.ftn.shu.bg/index.php/jsar/article/view/387.