By Lévy T.   in Historia Mathematica

ISSN:0315-0860|26|1|81-82

Academic Press‎(1999)‎

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By Dupin G.   Lévy T.   in Acta Acustica united with Acustica

ISSN:1610-1928|44|1|10-13

S. Hirzel Verlag‎(1980)‎

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