Resume
This work is cataloged in the Scientific Portal. Officially published in South African Journal of Economic and management Sciences (2021). Referenced as: "Machado, Celsa M.D.C.; Saraiva, António F.M.G.; Vieira, Paulo D.D.".
The complete abstract and full text can be accessed directly at the official DOI: https://doi.org/10.4102/sajems.v24i1.3435