OKENWA, W. O.; NDU, I. K.; EKWOCHI, U.; NDUAGUBAM, O. C.; AMADI, O. F.; ASINOBI, I. N.; OSSAI, E. N. Recognition and interpretation of road signs by commercial drivers in Enugu Nigeria. International Journal Of Community Medicine And Public Health, [S. l.], v. 6, n. 10, p. 4181–4186, 2019. DOI: 10.18203/2394-6040.ijcmph20194472. Disponível em: https://www.ijcmph.com/index.php/ijcmph/article/view/5181. Acesso em: 30 mar. 2026.