@article{ZNSL_2015_438_a3,
     author = {M. I. Belishev and A. F. Vakulenko and A. Ya. Kazakov},
     title = {Evolution of wave field jumps near caustics (elementary approach)},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {46--72},
     publisher = {mathdoc},
     volume = {438},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2015_438_a3/}
}