Cascaes da Silva, F.; Gonçalves, E.; Valdivia Arancibia, B. A.; Graziele Bento, S.; da Silva Castro, T. L.; Soleman Hernandez, S. S.; da Silva, R. Estimators of Internal Consistency in Health Research: The Use of the Alpha Coefficient. Rev Peru Med Exp Salud Publica 2015, 32 (1), 129-138. https://doi.org/10.17843/rpmesp.2015.321.1585.