@Article{431663,
     author = "Stanisław Bafia",
     title = "Papieża Sylwestra II (Gerberta z Aurillac) doktryna o wartości natury",
     year =  2000,
     volume =  37,
     number =  1,
     journal =  Studia Warmińskie,
     pages =  s. 49-59,
    }