TY - BOOK AU - Golubitsky, Martin. AU - Schaeffer, David G. TI - Singularities and groups in bifurcation theory T2 - Applied mathematical sciences SN - 3540909990 U1 - 515.353 PY - 1984/// CY - New York: PB - Springer Verlag, KW - Banach spaces KW - Linear elliptic KW - Math KW - Unfolding theory ER -