DOI:https://doi.org/10.1103/PhysRevLett.66.1246
©1991 American Physical Society
H. Buhnmann, W. Joss, K. v. Klitzing, I. V. Kukushkin, G. Martinez, A. S. Plaut, K. Ploog, and V. B. Timofeev
Vol. 66, Iss. 9 — 4 March 1991
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