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In Brief
Physics Today 22 (5), 59–61 (1969);
This article has been cited by the following articles in journals that are participating in CrossRef Cited-by Linking.
- G. S. Lakhina
- B. Buti
Physical Review A 5 (4), 1846 (1972);
- D. W. Ignat
- J. L. Hirshfield
Physical Review A 1 (3), 872 (1970);