Caiza, J., M. Salas, C. Guevara, and J. Ramírez. “Identification of Factors of Vulnerability of Self-Employed Workers and in Relation to Dependency in Times of COVID-19 in Ecuador”. Cuestiones Económicas, Vol. 31, no. 3, Nov. 2021, p. Autores: Josselyn Caiza , Marjorie Salas , Carolina Guevara y José Ramírez, https://estudioseconomicos.bce.fin.ec/index.php/RevistaCE/article/view/369.