URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::3e5fd2093a154567526ae53a301b35afhttps://doi.org/10.1007/s11665-012-0280-6
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::e575809ace892f4dec1f272adc0ed288https://doi.org/10.1080/10426914.2011.566781
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::20c932274f3061216e8fca102c5a7cf8https://doi.org/10.1109/iciea.2009.5138781