@conference{appl-of-neural-netw-in-est-fmax,
  author = {Zabołotny, Wojciech Marek and Wołłk-Łaniewski, Przemysław
            and Łuczywek, Elżbieta and Fersten, Ewa},
  title = "Application of Neural Networks in Estimation of 
           Maximum Frequency in Transcranial Doppler Signal",
  booktitle = "Proceedings of the MBB 98",
  year = 1998,
  pages = "3-67 -- 3-70"}
@article{appl-of-neural-netw-in-est-fmax2,
  author= {Zabołotny, Wojciech Marek and Wołłk-Łaniewski, Przemysław
            and Łuczywek, Elżbieta and Fersten, Ewa},
  title = "Application of Neural Networks in Estimation of 
           Maximum Frequency in Transcranial Doppler Signal",
  journal = Automatika,
  number = "1-2",
  year = 1999,
  volume = 40,
  pages = "19--24"}