1. Normal forms for functions near degenerate critical points, the Weyl groups Ak,Dk,Ek and Lagrangian singularities;Arnol’d;Functional Analysis and its Applications,1972
2. Singularities of systems of rays;Arnol’d;Uspekhi Matematicheskykh Nauk,1983
3. Singularities of Caustics and Wave Fronts;Arnol’d,1990
4. Singularities of Differentiable Maps, Volume I;Arnol’d,1985
5. Caustique Mystique, Siéminaire Bourbaki;Bennequin;Astérisque,1986