URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::ceaee04a0d4c510a676d346f9e4e1382https://doi.org/10.1111/j.1540-6385.2007.00320.x
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::55a0c9e0c9f1f905d3be94825e422207https://doi.org/10.1111/j.1745-9125.1972.tb00547.x