1. V. Privman and N. M. ?vraki?,Directed Models of Polymers, Interfaces, and Clusters: Scaling and Finite-Size Properties (Lecture Notes in Physics, Vol. 338, Springer-Verlag, Berlin, 1989).
2. P. M. Binder, A. L. Owczarek, A. R. Veal, and J. M. Yeomans,J. Phys. A 23:L975 (1990).
3. R. Brak, A. Guttmann, and S. Whittington,J. Phys. A 25:2437 (1992).
4. D. J. Klein and W. A. Seitz, inNonlinear Topics in Ocean Physics, A. R. Osbourne, ed. (North-Holland, Amsterdam, 1991).
5. V. Privman, G. Forgacs, and H. L. Frisch,Phys. Rev. B 37:9897 (1988).