Hengstmann, S. (2000). A measurement of diffractive charm production at HERA. Universität Zürich.
Lua i Stíl Chicago (17ú heag.)Hengstmann, Stefan. A Measurement of Diffractive Charm Production at HERA. Switzerland: Universität Zürich, 2000.
Lua MLA (8ú heag.)Hengstmann, Stefan. A Measurement of Diffractive Charm Production at HERA. Universität Zürich, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.