@Article{407111,
     author = "Henryk Gurgul, Artur Machno, Roland Mestel",
     title = "Modelin of Returns and Trading Volume by Regime Switching Copulas",
     year =  2013,
     volume =  13,
     number =  ,
     journal =  Managerial Economics,
     pages =  s. 45-64,
    }