Golubitsky, Martin Schaeffer, David G. Singularities and groups in bifurcation theory,v.1 - New York Springer-Verlag 1985 - xvii, 463p. 114 ill., 22 cm. - Applied mathematical sciences . ISBN: 0387909990 Subjects--Uniform Titles: Bifurcation theorySingularity throry Dewey Class. No.: 515.353 / GOL