Feby Milanie; Abdiyanto; Ria Pratiwi Atmaja; Hasqiban Ritonga; Wahyu Rinaldi; Azura Cahaya; M.Arief Kurniawan; Dony Hardyansyah Pasaribu; Tesa Harefa. ANALYSIS OF THE INFLUENCE OF SEI MANGKEI SPECIAL ECONOMIC ZONE INFRASTRUCTURE ON THE ECONOMIC TRANSFORMATION OF SIMALUNGUN REGENCY. BESTI 2026, 4, 828-847.