KIJEK, Tomasz; KASZTELAN, Armand. Eco-innovation as a Factor of Sustainable Development. Problemy Ekorozwoju, [S. l.], v. 8, n. 2, p. 103–112, 2013. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4854. Acesso em: 17 apr. 2025.