Disputatio Physica, De Voluntate. / Quam ... Sub Præsidio ... Dn. Johannis Sperlings ... publico & placido Eruditorum examini submittet. Georgius Balthasarus Spudæus Sveviphordo Francus. In Auditorio Majori, ad d. 1. Sept. horis antemeridianis. - Spudaeus, Georg Balthasar (Ex officina Typograph. Michaelis Wendt, 1649)