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