Sultanova M. INNOVATSION RIVOJLANISHNING SPIRAL MODELLARI: UCHTA, TO‘RTTA VA BESH HELIX MODELI. IIPT [Internet]. 2025 May 30 [cited 2026 Jun. 13];2(3):146-54. Available from: https://www.sci-p.uz/index.php/aept/article/view/2666