الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::8307cc5573d5577aa0da8dfb6ce08507Testhttps://doi.org/10.1007/978-981-15-7305-7_2Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::fdfe5d6195a042ea6fca93a561751451Testhttps://doi.org/10.1007/978-981-15-7305-7_5Test