Hozam és gyakoriság. Journal of Central European Green Innovation, [S. l.], v. 9, n. 2, p. 19–34, 2021. DOI: 10.33038/jcegi.2910. Disponível em: https://journal.uni-mate.hu/index.php/jcegi/article/view/2910.. Acesso em: 3 may. 2024.