الوصول الحر: https://doaj.org/article/b362c48126e447bb9c5d13a9ce1ebf8dTest
الوصول الحر: https://doaj.org/article/bdbfe9127af74170993d9cf9eb4b5e7dTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54eb5f83be1752ec4fe14b2e632e4385Testhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352021000400916&tlng=enTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ab750d5120f1b40245313a15ac39560Testhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352021000601105Test
الإتاحة: https://doi.org/10.6084/m9.figshare.16490645.v1Test