vliegtuigen in gevecht Junkers Ju 87 1937-1941 / [vert. ILC Taleninstituut] Jagdgeschwader 27 : die Dokumentation über den Einsatz an allen Fronten 1939 - 1945 / Hans Ring, Werner Girbig History of the German night fighter force, 1917-1945 / Gebhard Aders ; [transl. from the German and ed. by Alex Vanags-Baginskis assisted by Brendan Gallagher]