@article{ZNSL_2000_264_a19,
     author = {M. M. Popov and I. N. Shchitov},
     title = {Propagation of the discontinueties in a system of two interactive wave equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {299--310},
     publisher = {mathdoc},
     volume = {264},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_264_a19/}
}