European Commission., & International Symposium of European research in the context of the International Polar Year. (2007). The challenges: Polar environment and climate. Conference proceedings. International Symposium Brussels, 5-6 March 2007 European research in the context of the International Polar Year. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων.

European Commission., and International Symposium of European research in the context of the International Polar Year. The Challenges: Polar Environment and Climate. Conference Proceedings. International Symposium Brussels, 5-6 March 2007 European Research in the Context of the International Polar Year. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2007.

European Commission., and International Symposium of European research in the context of the International Polar Year. The Challenges: Polar Environment and Climate. Conference Proceedings. International Symposium Brussels, 5-6 March 2007 European Research in the Context of the International Polar Year. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2007.