M. K. Montes, M. E. Moreira, and I. Howland, “Carbon monoxide levels in workers at the Cerro de Guayabal Toll Booth, Ecuador”, J. Adv. Educ. Sci. Humanit., vol. 1, no. 2, pp. 13–18, Jul. 2023, doi: 10.5281/zenodo.14602145.