الإتاحة: http://repositorio.bc.ufg.br/tede/handle/tde/1481Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=od______3056::b74b0281836bac6bf7706de3f1956ed9Testhttp://repositorio.bc.ufg.br/tede/handle/tde/1481Test
الإتاحة: http://repositorio.bc.ufg.br/tede/handle/tde/1481Testhttp://repositorio.bc.ufg.br/handle/ri/8202Test