@misc{_Calendarium,
 howpublished={online},
 publisher={Henrik János Frauenheim},
 title={Calendarium Cassoviense, ad Annum Jesu Christi MDCLII. Post Bisextilem, ad Meridianum Cassoviensem, et Elevationem Poli 48. Graduum, 53. m. in usum Regni Hungariæ, ac Vicinarum Provinciarum, Opera, et Studio Cujusdam Astrophili è Societate Jesu, in Episcopali Universitate Cassoviensi in Hungaria},
 type={czasopismo starodruczne},
}