الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a42c5ca95f1daa172c35c6f84fbdf85bTesthttps://doi.org/10.1002/lsm.1900080509Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::0644905bc24ae24ae6b573b496b49756Testhttps://doi.org/10.1007/bf02593798Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a1fee2d6b8e8647520bf231e42e8811Testhttps://pubmed.ncbi.nlm.nih.gov/3046093Test