Fairclough, Graham. „Summary of Eucaland Project WP 3. – Classifying Europe: An Outcome of the Eucaland Project“. TÁJÖKOLÓGIAI LAPOK, Bd. 8, Nr. Suppl.1, Dezember 2010, S. 15-16, https://journal.uni-mate.hu/index.php/tl/article/view/4043.