@article{bartol_orłowska_skowron_1999, 
  title={Helena Rasiowa, 1917-1994}, 
  volume={46}, 
  DOI={10.4064/-46-1-9-21}, 
  publisher={Institute of Mathematics, Polish Academy of Sciences}, 
  author={Bartol and Orłowska and Skowron}, 
  year={1999}
  }