“FUNCTIONING OF THE APARTMENT REAL ESTATE MARKET – EXAMPLE OF AQUARIUS APARTHOTEL IN KOŁOBRZEG”. Research Bulletins of the Faculty of Economic Sciences, vol. 1, no. 21, Jan. 2018, pp. 199-12, https://ezeszyty.wne.tu.koszalin.pl/index.php/zeszyty/article/view/73.