الإتاحة: https://doi.org/10.5167/uzh-23464610.1101/2023.01.19.524484Testhttps://www.zora.uzh.ch/id/eprint/234646Test/https://www.zora.uzh.ch/id/eprint/234646/1/ZORA234646.pdfTest
الوصول الحر: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445747Test
الإتاحة: http://hdl.handle.net/10419/249022Test
الإتاحة: http://hdl.handle.net/10419/222107Test
الإتاحة: https://mediatum.ub.tum.de/1486330Testhttps://mediatum.ub.tum.de/doc/1486330/document.pdfTest
الإتاحة: https://doi.org/10.17617/2.3054666Testhttp://hdl.handle.net/21.11116/0000-0003-9737-5Testhttp://hdl.handle.net/21.11116/0000-0003-9739-3Test
الإتاحة: http://hdl.handle.net/10419/194028Test