J. . van Ophem, V. . Kohout, and . W. . Heijman, “Transition economy and happiness the Czech Republic compared with the Netherlands in the 1990- 2004 period”, APSTRACT, vol. 10, no. 2-3, pp. 119–126, Aug. 2016, doi: 10.19041/APSTRACT/2016/2-3/13.