الإتاحة: https://ideas.repec.org/a/abd/kauiea/v25y2012i2no3p79-115.html
الإتاحة: https://ideas.repec.org/a/abd/kauiea/v21y2008i1no2p27-46.html
الإتاحة: https://ideas.repec.org/a/abd/kauiea/v12y2000i1no6p3-57.html
الإتاحة: https://ideas.repec.org/a/abd/kauiea/v29y2016i1no6p83-87.html
الإتاحة: https://ideas.repec.org/a/abd/kauiea/v21y2008i1no8p63-68.html