DOI:https://doi.org/10.1103/PhysRevLett.63.1539
©1989 American Physical Society
J. Ashkenazi, W. E. Pickett, H. Krakauer, C. S. Wang, B. M. Klein, and S. R. Chubb
Vol. 63, Iss. 14 — 2 October 1989
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