M. O. Garzón-Duque, M. D. Cardona-Arango, F. L. Rodríguez-Ospina, e A. M. egura-Cardona, “Informality and employment vulnerability: application in sellers with subsistence work”, Rev. saúde pública, vol. 51, p. 89, out. 2017, doi: 10.11606/S1518-8787.2017051006864.