Title: Caustics, Catastrophes and Wave Fields, Author: Yu.A. Kravtsov
Title: Singularities of Caustics and Wave Fronts / Edition 1, Author: Vladimir Arnold
Title: Caustics, Catastrophes and Wave Fields, Author: Yu.A. Kravtsov
Title: Singularities of Caustics and Wave Fronts / Edition 1, Author: Vladimir Arnold