M. S. Domnina, A. S. Kryukovsky, D. V. Rastyagaev, “Mathematical Modeling of the Wave-Field Structure in the Vicinity of Edge Catastrophe B4”, J. Commun. Technol. Electron., 68:S3 (2023), S338
Arnold's Problems, 2005, 181
Inna Scherbak, Aviva Szpirglas, “Lagrange transformations and duality for corner and flag singularities”, Isr J Math, 111:1 (1999), 77
I. Scherback, A. Szpirglas, “Boundary singularities: Legendre and Lagrange transforms and duality”, J Math Sci, 82:5 (1996), 3702
И. Г. Щербак, “Фокальное множество поверхности с краем и каустики групп, порожденных отражениями Bk, Ck, F4”, Функц. анализ и его прил., 18:1 (1984), 90–91; I. G. Shcherbak, “Focal set of a surface with boundary, and caustics of groups generated by reflections Bk, Ck, and F4”, Funct. Anal. Appl., 18:1 (1984), 84–85