@Article{497231,
     author = "Joanna Zielińska-Szczepkowska, Małgorzata Samusjew",
     title = "Tourism Activity among Seniors : a Case-Study from Warmian and Masurian Voivodeship",
     year =  2015,
     volume =  ,
     number =  4 (32),
     journal =  Ekonomiczne Problemy Turystyki,
     pages =  s. 193-204,
    }