@article{DAN_1970_191_6_a12,
     author = {N. N. Chaus},
     title = {On the uniqueness of a solution of the {Cauchy} problem for a second order equation with variable coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {1244--1246},
     publisher = {mathdoc},
     volume = {191},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_6_a12/}
}