J. S. B. Bezerra, T. de M. Ramos, and R. De-Bortoli, “The relationship between Investments to Increase Human Capital in the HEI and the Return on Intellectual and Integrative Capital”, Int J Innov Educ Res, vol. 9, no. 4, pp. 120–128, Apr. 2021, doi: 10.31686/ijier.vol9.iss4.3026.