«INTERNATIONAL EXPERIENCE IN MARKETING MANAGEMENT AND PRODUCTION EFFICIENCY IMPROVEMENT: LEAN MANAGEMENT AND THE REFA METHOD». International scientific-electronic journal “Pioneering studies and theories” 1, no. 1 (апрель 7, 2026): 3–5. просмотрено август 13, 2026. https://pstjournal.uz/index.php/pst/article/view/104.