BELTRAN, J. A.; GUAMÁN NARVÁEZ , E. R. .; VAZCO SILVA , C. D. .; USIÑA TIRIRA , E. P. . Comparative Analysis of the Octane Rating of Extra and Super Gasoline at Stations in Quito. Investigación Tecnológica IST Central Técnico, [S. l.], v. 8, n. 1, p. 20–31, 2026. Disponível em: https://www.investigacionistct.ec/ojs/index.php/investigacion_tecnologica/article/view/205. Acesso em: 14 nov. 2026.