1. D.B. Abraham, in Phase Transitions and Critical Phenomena, edited by C. Domb, J.L. Lebowitz (Academic Press, New York, 1986), Vol. 10
2. S. Dietrich, in Phase Transitions and Critical Phenomena, edited by C. Domb, J.L. Lebowitz (Academic Press, New York, 1988), Vol. 12
3. W. Selke, W. Pesch, Z. Phys. B 47, 335 (1982)
4. W. Selke, D.A. Huse, Z. Phys. B 50, 113 (1983)
5. M.E. Fisher, J. Stat. Phys. 34, 667 (1984)