Lettere 1920-1963 - Heidegger, Martin, 1889-1976. (OLS)http://ftis/name/51729; Saner, Hans. (OLS)http://ftis/name/61056; Biemel, Walter. (OLS)http://ftis/name/62978; Jaspers, Karl, 1883-1969. (OLS)http://ftis/name/59071 (Raffaello Cortina,, 2009)