KÖRNER, Janos and SIMONYI, Gábor, 1995. Trifference. Studia Scientiarum Mathematicarum Hungarica. 1995. Vol. 30, p. 95–103.
r.Trifference.Körner.SimonyiKÖRNER, Janos and SIMONYI, Gábor, 1995. Trifference. Studia Scientiarum Mathematicarum Hungarica. 1995. Vol. 30, p. 95–103.