Onophagiam Silesiorum, Amplissimi Philosophici Collegii Indultu Dissertatione Historica M. Casparus Sommer/ & Johannes Georgius Gottschalck/ Vratislavia Silesii refellent. Ad D. XIX. Mai. Anno MDCLXXVII. In Auditorio Veteri - Sommer, Caspar (Ziegenbein, 1677)