THERAYUT SUWANPRATEEP. Study on Lubricating Oil Characteristics Using Viscosity Index. Agriculture and Natural Resources, Bangkok, Thailand, v. 21, n. 1, p. 75–80, 1987. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/242584. Acesso em: 18 sep. 2026.