@misc{Posthumus_Oene_Fossilium,
 author={Posthumus, Oene},
 howpublished={online},
 publisher={W. Junk},
 language={Tekst niem.},
 type={czasopismo},
 title={Fossilium Catalogus. II, Plantae. Pars 12: O. Posthumus, Inversicatenales (Botryopterideae et Zygopterideae)},
 keywords={czasopisma, paleontologia, skamieliny},
}