@misc{,
 copyright={Creative Commons Attribution BY 4.0 license},
 howpublished={online},
 type={Text},
 URL={http://rcin.org.pl/Content/73940/PDF/Opalski_Zagadnienie-ksztaltowania%20(1).pdf},
 keywords={Syphilis lesions - central nervous system, Syphilis - histopatological changes},
}