DOI:https://doi.org/10.1103/PhysRevLett.7.170
©1961 American Physical Society
S. Gorodetzky, G. Sutter, R. Armbruster, P. Chevallier, P. Mennrath, F. Scheibling, and J. Yoccoz
Vol. 7, Iss. 5 — 1 September 1961
Sign up to receive regular email alerts from Physical Review Letters