Assessment of dielectric insulation condition of power transformers using Dielectric Absorption Ratio (DAR) and Polarization Index (PI). Международный научный журнал «Инженер», [S. l.], v. 3, n. 4, p. 65–67, 2026. DOI: 10.56143/3030-3893-2025-4-65-67. Disponível em: https://engineer.tstu.uz/index.php/engineer-tstu/article/view/131. Acesso em: 26 jul. 2026.