الإتاحة: https://mpra.ub.uni-muenchen.de/112888Test/https://mpra.ub.uni-muenchen.de/112888/1/MPRA_paper_112888.pdfTest
الإتاحة: https://mpra.ub.uni-muenchen.de/90647Test/https://mpra.ub.uni-muenchen.de/90647/1/MPRA_paper_90647.pdfTest
الإتاحة: https://mpra.ub.uni-muenchen.de/82105Test/https://mpra.ub.uni-muenchen.de/82105/1/MPRA_paper_82105.pdfTest
الإتاحة: https://mpra.ub.uni-muenchen.de/75448Test/https://mpra.ub.uni-muenchen.de/75448/1/MPRA_paper_75448.pdfTest
الإتاحة: https://mpra.ub.uni-muenchen.de/70931Test/https://mpra.ub.uni-muenchen.de/70931/2/MPRA_paper_70931.pdfTest
الإتاحة: https://mpra.ub.uni-muenchen.de/14665Test/https://mpra.ub.uni-muenchen.de/14665/1/MPRA_paper_14665.pdfTest