@article{TIMB_2019_27_1_a4,
     author = {V. I. Korzyuk and I. S. Kozlovskaja and S. N. Naumavets},
     title = {Statement of border tasks on the plane dependent on the coefficients for the type of the wave {equation.~II}},
     journal = {Trudy Instituta matematiki},
     pages = {37--43},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2019_27_1_a4/}
}