MAHLBERG, Bernhard - LUPTÁČIK, Mikuláš. Eco-efficiency and Eco-productivity Change over Time in a Multisectoral Economic System. - Registrovaný: Scopus, Registrovaný: Web of Science. In European Journal of Operational Research. - Amsterdam : North-Holland. ISSN 0377-2217, 1 May 2014, vol. 234, no. 3, pp. 885-897.