BALCERZAK, Adam P. and PIETRZAK, Michał Bernard. RESEARCH AND DEVELOPMENT EXPENDITURES AND QUALITY OF LIFE IN EUROPEAN UNION COUNTRIES. Ekonomia i Prawo. Economics and Law. Online. 30 September 2015. Vol. 14, no. 3, pp. 285-302. [Accessed 25 July 2024]. DOI 10.12775/EiP.2015.018.