الوصول الحر: https://doaj.org/article/6187406f628f455ab48615a592652ed8Test
الوصول الحر: https://doaj.org/article/a110f5756de1408188de09cd31fbfff2Test
الوصول الحر: https://doaj.org/article/d7c67ecba5a64849a33dc2a42f1b6d57Test
الوصول الحر: https://doaj.org/article/a7e8ff44fb8e4e488e3f61e2a42b5d3aTest
الإتاحة: https://doi.org/20.500.12854/48671Testhttps://directory.doabooks.org/handle/20.500.12854/48671Testhttps://hdl.handle.net/20.500.12854/48671Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b49265659ca3057d5f72ad31631d5b5Testhttps://www.bib.irb.hr/990521Test
الإتاحة: http://jcm.asm.org/content/39/2/791.full.pdfTest