Cerf, Jean Sur les difféomorphismes de la sphère de dimension trois (r p4 s=0)/ Jean Cerf. - Berlin: Springer-Verlag, 1968. - 133 p. - Lecture notes in mathematics; 53. . - Lecture notes in mathematics (Springer-Verlag); 53. . LCCN: 68024615 Nat. Bib. No.: GBD*** Subjects--Topical Terms: Differential topology.Homology theory.Homotopy theory. Dewey Class. No.: 513/.83