@Article{ authors = " Artur Malczewski, Agnese Zïle-veisberga", title = "Similarities and Differences in Changes NPS Market Brought by New Regulatory Approaches in Selected eastern and Central European States with Mostly Focus on Poland and Latvia ", journal = "Journal of Geography, Politics and Society", issue = "2019 / Tom 9 / Numer 2", pages = "10 - 19" }