@misc{Swan_Jerry_Polytypic,
 author={Swan, Jerry and Krawiec, Krzysztof and Ghani, Neil},
 copyright={Swan, Jerry},
 copyright={Krawiec, Krzysztof},
 copyright={Ghan, Neil},
 howpublished={online},
 language={eng},
 type={raport z badań},
 title={Polytypic genetic programming.},
 keywords={polyptic programming, datatype programming},
}