Tikk, Domonkos, Ferenc P. Szidarovszky, György Biró, Zsolt Tivadar Kardkovács, and Gábor Lemák. “Topic and Language Specific Internet Search Engine”. Acta Cybernetica 18, no. 2 (January 1, 2007): 275–291. Accessed May 11, 2025. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3718.