@Article{485027,
     author = "Izabela Kotowska",
     title = "The influence of Sulphur Directive on the ferry market : Świnoujście-Ystad/Trelleborg ferry lines : a case study",
     year =  2015,
     volume =  ,
     number =  119,
     journal =  Ekonomiczne Problemy Usług,
     pages =  s. 11-22,
    }