@misc{_Summarius, howpublished={online}, publisher={Ungler, Florian}, language={lat}, type={starodruki}, title={Summarius computus ex variis computualibus libris [...] recollectus cum additione declarationum capituli uniusquiusque denuo castigatus et revisus}, keywords={matematyka 16w., astronomia 16w., kalendarze 16w.}, }