Vivos Voco. Post-war Correspondence between Sergey Hessen and Ivan Lapshin: Year 1946
... their letters Hessen and especially Lapshin expound the Kantian element of their philosophical views as well as sharing their impressions of the development of philosophy in the middle of the twentieth century.
Barsova, L. G., ed. 2006. Neizdannyi Ivan Lapshin [The Unpublished Ivan Lapshin]. St. Petersburg: St Petersburg Theatre Arts Academy Press.
Berdyaev, N. A., 1924. Novoe srednevekovie [The New Middle Ages = The End of Our Time]. Berlin: Obelisk. (In Rus.)
Chekhov, A. P., 1914. Pis’ma A.P. Chekhova ...
