A Comment on the Letter by J. M. Kim and J. M. Kosterlitz, Phys. Rev. Lett. 62, 2289 (1989).
DOI:https://doi.org/10.1103/PhysRevLett.63.1191
©1989 American Physical Society
D. E. Wolf
J. Kertész
Vol. 63, Iss. 11 — 11 September 1989
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