الوصول الحر: https://explore.openaire.eu/search/publication?articleId=od______3056::432cd774c8d424c944ed9371f7ef90d2Test
الإتاحة: https://doi.org/20.500.12110/tesis_n4882_EirinTesthttps://hdl.handle.net/20.500.12110/tesis_n4882_EirinTesthttp://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=aextesis&d=tesis_n4882_Eirin_oaiTest
الإتاحة: https://doi.org/10.1136/sextrans-2012-050594Testhttp://hdl.handle.net/11336/16880Test
الإتاحة: https://doi.org/10.1089/aid.2008.0024Testhttp://hdl.handle.net/11336/100078Test