Fairclough, Graham. “Summary of Eucaland Project WP 3. – Classifying Europe: An Outcome of the Eucaland Project”. TÁJÖKOLÓGIAI LAPOK 8, no. Suppl.1 (dezembro 30, 2010): 15–16. Acesso em dezembro 5, 2025. https://journal.uni-mate.hu/index.php/tl/article/view/4043.