@article{ZNSL_1989_179_a13,
     author = {L. A. Molotkov},
     title = {On the investigation of wave propagation in the models of cracked media},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {116--127},
     year = {1989},
     volume = {179},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1989_179_a13/}
}