@article{IM2_1977_11_2_a10,
     author = {\'E. B. Bykhovskii},
     title = {A~boundary value problem for a~quasilinear equation of first order with arbitrary dependence of the direction of the characteristics at the boundary on the unknown function},
     journal = {Izvestiya. Mathematics },
     pages = {397--416},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1977_11_2_a10/}
}