@Article{646478,
     author = "Piotr Bórawski, James W. Dunn",
     title = "",
     year =  2012,
     volume =  26,
     number =  ,
     journal =  Zeszyty Naukowe Ostrołęckiego Towarzystwa Naukowego,
     pages =  s. 29-39,
    }