URL الوصول: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1981-57942018000200325
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f13744e22f0722eb3e9fd9b15a4ba124http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1981-57942018000200325&lng=en&tlng=en
URL الوصول: https://doaj.org/article/c36cb16b42224fb68d68149203992c04