1. Lagrangian manifolds with singularities, asymptotic rays and the open swallowtail;Arnol’d;Moscow State Univ. Translated from Funktsional’nyi Analiz i Ego Prilozheniya,1981
2. Singularities in Variational Calculus;Arnol’d;J. Math. Sci.,1984
3. Singularities of caustics and wave fronts;Arnol’d,1990
4. Mathematical problems in classical physics;Arnol’d,1994
5. Symplectic geometry and its applications;Arnol’d,1990