(Published in English as "The Messianic Secret", London 1971)* "Paulus", Halle 1904 / Tübingen 1907 (Published in English as "Paul", London 1907)* "Die Echtheit des zweiten Thessalonicherbriefes untersucht" (The Authenticity of the Second Letter to the Thessalonians investigated), Leipzig 1903.
(Published in English as "The Messianic Secret", London 1971)* "Paulus", Halle 1904 / Tübingen 1907 (Published in English as "Paul", London 1907)* "Die Echtheit des zweiten Thessalonicherbriefes untersucht" (The Authenticity of the Second Letter to the Thessalonians investigated), Leipzig 1903.