URL الوصول: https://doaj.org/article/7ee5078ba0794d1b8989cbf9aa6367b8
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::cbb51540b86f76ddcf568ad06b579646https://doi.org/10.1016/j.jmse.2021.02.003
URL الوصول: https://doaj.org/article/b82bb336471448f886d8f6c1b8453193