1. Maletta, H.: In: Lecture Notes in Physics. Vol. 192. Berlin, Heidelberg, New York: Springer 1983
2. Binder, K.: Z. Phys. B?Condensed Matter48, 319 (1982)
3. Aharony, A.: In: Phase transitions and critical phenomena. Domb, C., Green, M.S. (eds.), Vol. VI. New York: Academic Press 1976
4. Stinchcombe, R.B.: In: Phase transitions and critical phenomena. Domb, C., Lebowitz, J.L. (eds.), Vol. VIII. New York: Academic Press 1984
5. Grinstein, G.S., Luther, A.: Phys. Rev. B13, 1329 (1976)