@ARTICLE{Urbański_Stanisław_Cross-Section_2011,
 author={Urbański, Stanisław},
 number={No 5},
 journal={Ekonomista},
 howpublished={online},
 year={2011},
 publisher={Polskie Towarzystwo Ekonomiczne},
 publisher={Instytut Nauk Ekonomicznych Polskiej Akademii Nauk},
 title={Cross-Section Changes of Rates of Return on the Shares Traded on the Warsaw Stock Exchange},
}