Hunya, Péter, Károly Varga, and Pál Fejes. “Some Remarks on the Paper of K. Varga and P. Fejes”. Acta Cybernetica 2, no. 1 (January 1, 1973): 61-64. Accessed May 6, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3103.