Ünlü, Ruhat, and Hasan Emirhan Usta. “Intra-Articular Platelet-Rich Plasma, Hyaluronic Acid, and Mesenchymal Stem Cell for Knee Osteoarthritis (2000-2025): A Multi-Database Bibliometric Analysis”. The European Research Journal (March 14, 2026): 1–9. Accessed April 5, 2026. https://eurj.org.tr/article/view/1154.