@Article{610897,
     author = "Katarzyna Kopycka",
     title = "Determinants of Early Retirement Transitions of Teachers in Poland : Does Regional Heterogeneity Play a Role?",
     year =  2014,
     volume =  13,
     number =  4,
     journal =  Studia Humanistyczne AGH,
     pages =  s. 97-124,
    }