@Article{497228,
     author = "Anna Gardzińska, Beata Meyer, Agnieszka Sawińska",
     title = "The Entity Structure of the Cross-Border Tourism Product",
     year =  2015,
     volume =  ,
     number =  4 (32),
     journal =  Ekonomiczne Problemy Turystyki,
     pages =  s. 169-182,
    }