@article{ZNSL_2011_393_a3,
     author = {M. I. Belishev},
     title = {Determination of distances to virtual source from dynamical boundary data},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {29--45},
     publisher = {mathdoc},
     volume = {393},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2011_393_a3/}
}