@misc{Niederle_P._Contrast_1983,
 author={Niederle, P. and Fridl, P. and Koudelkova, E. and Jebavy, P. and Haco, M.},
 copyright={Rights Reserved - Free Access},
 journal={Prace IPPT IFTR REPORTS},
 address={Warszawa},
 howpublished={online},
 year={1983},
 publisher={Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk},
 language={eng},
 type={Text},
 title={Contrast Doppler echocardiography},
 URL={http://rcin.org.pl/ippt/Content/6457/PDF/WA727_10165_57027-10-1983_Niederle-28.pdf},
 keywords={Ultradźwięki - zastosowanie w diagnostyce [KABA]},
}