الإتاحة: https://doi.org/10.1162/jocn_a_02087Testhttps://repository.ubn.ru.nl//bitstream/handle/2066/302942/302942.pdfTesthttps://repository.ubn.ru.nl/handle/2066/302942Test
الإتاحة: https://doi.org/10.1016/j.jmb.2018.08.001Testhttps://hdl.handle.net/11499/30290Test