By Banyai, Istvan
By Keri, Gyorgy, Toth, Istvan
By Hargittai, Istvan, Hargittai, Magdolna
By Kun, Istvan
By Meszaros, Istvan, Foster, John Bellamy
By Tarrosy, Istvan, Szabó, Lorand, Hyden, Goran