@misc{conversion+of+raster+images+into+vector+graphics,
    author = {Ciężobka, Marek},
    title = {Conversion of raster images into vector graphics},
    journal = {R. 105, Z. 3, 3-M},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2008},
    number = {R. 105, Z. 3, 3-M}
}