Arnold, V.I. / Varchenko, A.N. / Gusein-Zade, S.M., Singularities of Differentiable Maps : Volume I: The Classification of Critical Points Caustics and Wave Fronts. Softcover reprint of the original 1st ed. 1985. (Monographs in Mathematics) 396 pp. (Springer-Verlag New York Inc., US) ＜M25-18526＞

Golubitsky, Martin / Schaeffer, David G., Singularities and Groups in Bifurcation Theory : Volume I. Softcover reprint of the original 1st ed. 1985. (Applied Mathematical Sciences) 466 pp. (Springer-Verlag New York Inc., US) ＜M25-18534＞