54. Gerhard Langer [in German] (2015). Isabella Guanzini [in German]; Kurt Appel [in German] (eds.). Europa mit oder ohne Religion? (in German). Vol. II

Igor Yasulovich

(Айболит-66, 1966) as episode Major Whirlwind (Майор Вихрь, 1967) as Kurt Appel The Golden Calf (Золотой телёнок, 1968) as young chauffeur The Diamond

Lüder Deecke

ISBN 978-3-89528-628-5. Was ist Geist aus der Sicht der Hirnforschung? In: Kurt Appel, H. P. Weber, Rudolf Langthaler, Sigrid Müller (eds.): Naturalisierung

Major Whirlwind

Lyudmila Davydova as Krysya, Polish underground fighter Igor Yasulovich as Kurt Appel, German soldier-driver, Krysya's groom Yevgeni Burenkov as Borodin, soviet

Four color theorem

proven by Kenneth Appel and Wolfgang Haken. This came after many false proofs and mistaken counterexamples in the preceding decades. The Appel–Haken proof proceeds

Found in articles

Break a leg