@article{UZERU_1987_1_a11,
     author = {H. A. Asatryan and Yu. A. Kravtsov},
     title = {The behaviour of the wave field at the breakdown of the ``gramophone{\textquoteright}{\textquoteright} type caustic into two ``cusps{\textquoteright}{\textquoteright}},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {75--80},
     publisher = {mathdoc},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1987_1_a11/}
}