MathSciNet bibliographic data MR229250 57.31 Cerf, Jean Sur les difféomorphismes de la sphère de dimension trois \$(\Gamma \sb{4}=0)\$$(\Gamma \sb{4}=0)$. (French) Lecture Notes in Mathematics, No. 53 Springer-Verlag, Berlin-New York 1968 xii+133 pp. Links to the journal or article are not yet available

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