الوصول الحر: https://doaj.org/article/5cc924dbee224ea4b0004158877af08fTest
الوصول الحر: https://doaj.org/article/41126f07ba9b44c1bbacd05d87886560Test
الوصول الحر: https://doaj.org/article/acc5b8a26d204775b77e449bde1bc4b5Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e62479b317fa467bffcbefd62598e27Testhttps://doi.org/10.3389/fphys.2020.601721Test