Anderson HL, Bharadwaj VK, Booth NE, Fine RM, Francis WR, Gordon BA, Heisterberg RH, Hicks RG, Kirk TBW, Kirkbride GI, Loomis WA, Matis HS, et al11 October 1976Journal article Journal:Physical Review LettersVolume:37Issue:15, American Physical Society (APS), pp.1034 - 1034No abstract availableKeywords:40 Engineering , 49 Mathematical Sciences , 51 Physical Sciences DOI10.1103/physrevlett.37.1034