Benkő L., editor (1993–1997), “R:hu:EWung”, in Etymologisches Wörterbuch des Ungarischen I–III [The Etymological Dictionary of Hungarian] (in German), Vol. 1: A–kop (1993), vol. 2: Kor–zs (1995), vol. 3: index (1997), Budapest: Akadémiai Kiadó, →ISBN
