الوصول الحر: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500620Test
الإتاحة: https://doi.org/20.500.12123/6671Testhttps://doi.org/10.1590/0001-3765201920180568Testhttps://hdl.handle.net/20.500.12123/6671Testhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500620&lng=en&nrm=iso&tlng=enTest
الإتاحة: https://doi.org/10.1590/0001-3765201920180568Testhttp://hdl.handle.net/11336/93882Test