@Article{398998,
     author = "Walter E. Block",
     title = "Thymology, Praxeology, Demand Curves, Giffen Goods and Diminishing Marginal Utility",
     year =  2012,
     volume =  ,
     number =  2,
     journal =  Studia Humana,
     pages =  s. 3-11,
    }