NEMEC, Peter - ŠTEFKO, Róbert - KUBÁK, Matúš. Better Environmental Value Using Public Procurement: Evidence from Visegrad Group Countries. In Finance a úvěr : Czech Journal of Economics and Finance. - Praha : UK Praha, Fakulta sociálních věd, 2022. ISSN 2464-7683, 2022, vol. 72, no. 4, pp. 296-327.