URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::d2984aa58a9fa8d5d5ba6b7cea1d1918https://doi.org/10.1002/sia.5075
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::1268f2f25c8970db341cf407b14506cfhttps://doi.org/10.1007/s11998-008-9108-6