الوصول الحر: https://doaj.org/article/8843ca96b8394774b7bfa2e49aa0584aTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::0451afab84eb4cfb4eeb0330670231a6Testhttps://doi.org/10.2196/preprints.41742Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c734eb108aca696729e07ad1bb534379Test
الإتاحة: https://hdl.handle.net/2152.5/10102Test
الإتاحة: https://doi.org/10.1007/s00403-020-02153-3Test