Golubitsky, Martin Singularities and groups in bifurcation theory - New York : Springer-Verlag, 1985 - 2 v. : il. - Applied mathematical sciences . p. 445-459 ISBN: 0387909990 Subjects--Topical Terms: TEORIA DE LA BIFURCACIONTEORIA DE SINGULARIDAD Dewey Class. No.: 515.35 / G629