Forschungsgrundlagen Hans VaihingerJörn BohrGerald HartungBülow & Schlupkothen XML servicessoftware developmentUniversity of Wuppertalurn:nbn:de:hbz:468-edhv2025-001384-6Albert Einstein an Vaihinger, 12.4.1920, Ts.-Durchschlag, Regest in: https://einsteinpapers.press.princeton.edu/vol9-doc/685Albert Einstein12.4.1920Hans VaihingerImmanuel KantAlbert Einstein an Vaihinger, 12.4.1920, Ts.-Durchschlag, Regest in: https://einsteinpapers.press.princeton.edu/vol9-doc/685

Regest (Zitat): „Ready to participate in the Halle discussion […] if he is in Berlin at the time. Asks for planned date of the general meeting of the Kant Society.“

Halle discussionvgl. Vaihinger an Einstein vom 4.4.1920