Silupu Garcés, Brenda Liz, and Sergio David Reyes Landa. “Analysis of Determinants and Costs of Informality in Small Businesses: An Empirical Study for Peru”. Journal of Quantitative Methods for Economics and Business Administration, vol. 27, July 2019, pp. 156-65, doi:10.46661/revmetodoscuanteconempresa.2915.