FREŠO, Slavomír. The European Union Ecolabel as a Cross-Border Eco-Trustmark: Evidence from the Visegrad Countries. In Visegrad Journal on Bioeconomy and Sustainable Development : International Scientific Journal. - Nitra : Slovak University of Agriculture in Nitra, 2025. ISSN 1339-3367, 2025, vol. 14, no. 2, s. 65-70.