of the city of Berlin (in German) Unter den Linden 9 and 11: Altes Palais and former Governor’s Building – Humboldt-Universität zu Berlin (页面存档备份,存于互联网档案馆)
rehearsal for the fall of the Berlin Wall - German), in: Profil 9 August 2014. Meyer, Michael. The picnic that brought down the Berlin Wall. Los Angeles Times
罗马尼亚第3集团军 罗马尼亚第4集团军 Ziemke 2002,第312頁. Ziemke, Earl F. Stalingrad to Berlin: The German Defeat in the East. Washington, D.C: Center of Military History, US
(英文)TUI Travel PLC and Air Berlin seal strategic alliance for their German flight business (页面存档备份,存于互联网档案馆) Air Berlin meldet Insolvenz an – Bundesregierung
Statistiken + „Grenzsicherung in Berlin“ 1989 Chronik der Mauer: Todesopfer an der Berliner Mauer (页面存档备份,存于互联网档案馆) (in German) Forschungsprojekt "Die Todesopfer