Williams, Colin C. «Why Do Informal Sector Competitors Hinder Formal Entrepreneurs More in Some Countries?». REGEPE Entrepreneurship and Small Business Journal 9, no. 4 (septiembre 2, 2020): 718–743. Accedido mayo 19, 2024. https://regepe.emnuvens.com.br/regepe/article/view/1981.