%0 Journal Article
%A H. A. Asatryan
%A Yu. A. Kravtsov
%T The behaviour of the wave field at the breakdown of the ``gramophone’’ type caustic into two ``cusps’’
%J Proceedings of the Yerevan State University. Physical and mathematical sciences
%D 1987
%P 75-80
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/UZERU_1987_1_a11/
%G ru
%F UZERU_1987_1_a11