Tschackert, Paul (1895). Allgemeine Deutsche Biographie(en alemán)35. Historischen Kommission bei der Bayerischen Akademie der Wissenschaften. pp. 123-35. «...only through the intercession of respected aristocrats was he rescued from death by fire, to which he had been condemned... in this prison he composed the Protestant hymn "There is salvation come forth to us."».
