Ramírez Rocha, A., L. A. Bernal Ponce, and M. Cervantes Zepeda. “Differences in the Interest Rates of Microfinance Institutions in Some Markets Economies: An HLM Approach”. Estudios Económicos De El Colegio De México, vol. 34, no. 2, July 2019, pp. 275-07, doi:10.24201/ee.v34i2.371.