@article{10_4064__27_1_257_269,
     author = {V. Kostin},
     title = {On the problem of symmetrization of hyperbolic equations},
     journal = {Banach Center Publications},
     pages = {257--269},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1992},
     doi = {10.4064/-27-1-257-269},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/-27-1-257-269/}
}