الوصول الحر: https://ntrs.nasa.gov/citations/31140667222098Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::199014704da0b5bce47978831876040dTesthttp://www.scopus.com/inward/record.url?scp=85082522665&partnerID=8YFLogxKTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::419fb73e92c2c3ae2fcefb2f21b332f7Testhttps://doi.org/10.1103/physrevlett.122.171301Test