GRZEBYK M, STEC M, STEC B. AN EVALUATION OF THE IMPLEMENTATION OF SUSTAINABLE DEVELOPMENT GOAL 7 IN EUROPEAN UNION COUNTRIES IN 2013 AND 2022 USING THE WARD’S METHOD. hss [Internet]. 2025Mar.31 [cited 2026Apr.10];32(1):47-9. Available from: https://journals.prz.edu.pl/hss/article/view/2002