Babinčák, Peter. “Subjective Happiness in Slovakia: Reliability and Validity of Measuring Happiness through the Subjective Happiness Scale”. European Journal of Mental Health 13, no. 2 (December 13, 2018), 111–132. Accessed November 21, 2024. https://ejmh.semmelweis.hu/index.php/ejmh/article/view/182.