الإتاحة: https://doi.org/10.2165/11594660Testhttp://hdl.handle.net/11615/34382Test
الإتاحة: https://doi.org/10.1016/j.ejim.2004.06.009Testhttp://hdl.handle.net/11615/34892Test
الإتاحة: https://doi.org/10.1016/S0953-6205Test(02)00185-1http://hdl.handle.net/11615/34889Test