Mulia, P., Behura, A. K. and Kar, S. (2016) “Categorical Imperative in Defense of Strong Sustainability”, Problemy Ekorozwoju / Problems of Sustainable Development, 11(2), pp. 29–36. Available at: https://ph.pollub.pl/index.php/preko/article/view/4940 (Accessed: 16 December 2025).