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Evaluación de la calidad de aceites lubricantes de motores de la central térmica esmeraldas ii, por ftir. Revista UTCiencia: i-ISSN: 1390-6909. e-ISSN: 2602-8263, [S. l.], v. 6, n. 1, p. 50–59, 2019. Disponível em: https://investigacion.utc.edu.ec/index.php/utciencia/article/view/257. Acesso em: 6 ago. 2026.