Valcheva D, Andreev E. COMPARISON BETWEEN TRADITIONAL IT INFRASTRUCTUREAND CLOUD SERVICE MODELS – TECHNOLOGICAL,ECONOMIC, AND OPERATIONAL ASPECTS. VFU [Internet]. 2025 Dec. 19 [cited 2026 Feb. 23];(24):790-8. Available from: https://ejournal.vfu.bg/index.php/vfu/article/view/251