الإتاحة: https://doi.org/10.1140/epjqt/s40507-020-0080-0Testhttp://hdl.handle.net/10044/1/80586Test
الإتاحة: https://doi.org/10.17863/CAM.53825Testhttps://www.repository.cam.ac.uk/handle/1810/306737Test
الإتاحة: https://doi.org/10.1088/1475-7516/2020/05/011Testhttp://cds.cern.ch/record/2704016Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::5330a09efb5d210382126e5687e73363Test