@article{RM_1981_36_6_a17,
     author = {S. E. Pastukhova},
     title = {On~the well-posedness of the mixed problem for a~strictly hyperbolic operator with a~singular directional derivative},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {193--194},
     publisher = {mathdoc},
     volume = {36},
     number = {6},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1981_36_6_a17/}
}