الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6626e385650e60f248d67c2cfa564e39Testhttps://doi.org/10.1186/s13613-016-0114-zTest
الإتاحة: https://doi.org/10.1007/s11356-013-2399-xTest
الإتاحة: https://doi.org/10.1007/s11356-012-1321-2Test
الإتاحة: https://doi.org/10.1007/s11356-012-1156-xTest