@Article{485034,
     author = "Anatoliy M. Kholodenko, Mykola A. Vereschaka",
     title = "The optimization of port charge rates on inland waterways",
     year =  2015,
     volume =  ,
     number =  119,
     journal =  Ekonomiczne Problemy Usług,
     pages =  s. 113-126,
    }