الإتاحة: https://doi.org/10.3390/su13031534Testhttps://doaj.org/article/f08e33a655db4839b702b3acac53bbeaTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09805c8846d15ba1cf8b09730549533cTesthttps://www.mdpi.com/2071-1050/13/3/1534Test