Achim, Monica Violeta, Sorin Nicolae Borlea, Lucian Vasile Găban, and Ionut Constantin Cuceu. “Rethinking the Shadow Economy in Terms of Happiness. Evidence for the European Union Member States”. Technological and Economic Development of Economy 24, no. 1 (January 17, 2018): 199-228. Accessed December 26, 2024. https://btp.vilniustech.lt/index.php/TEDE/article/view/84.