Notice

• 31 May 1971
• journal article
• Published by American Physical Society (APS) in Physical Review Letters
• Vol. 26  (22) , 1409
• https://doi.org/10.1103/physrevlett.26.1409

Abstract

Keywords

• DOI.ORG/10.1103/PHYSREVLETT.26.1409
• HTTPS
• NOTICE DOI