A Comment on the Letter by Rica and Tirapegui, Phys. Rev. Lett. 64, 878 (1990).
DOI:https://doi.org/10.1103/PhysRevLett.67.404
©1991 American Physical Society
I. S. Aranson, L. Kramer, and A. Weber
Vol. 67, Iss. 3 — 15 July 1991
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