@misc{Grunaeus_Simon_(1564-1628)._Crux,
 author={Grunaeus, Simon (1564-1628).},
 howpublished={online},
 language={ger},
 title={Crux christi Gloriatio Christianorum : Pro Symbolo et solatio Venerandi Viri Joachimi Libenovii},
 type={stary druk},
}