Moralitatem Merae Cogitationis, Praeside Valentino Velthem ... publico eruditorum examini sistit Jacobus Ritter, Hallensis Saxo, Autor. Ad diem Mercurii. A.O.R. MDCLXXV. - Ritter, Jakob; Krebs, Samuel 1627-1679 (Krebsius, 1675)