Vallejo Morán, Luis A, et al. “Hazardous Solid Waste in a Mass Passenger Transport Company in Cali, Colombia”. Revista Colombiana De Salud Ocupacional, vol. 3, no. 1, Mar. 2013, pp. 19-25, https://revistas.unilibre.edu.co/index.php/rc_salud_ocupa/article/view/4853.