@article{DAN_1967_174_1_a5,
     author = {M. E. Lerner and S. P. Pul'kin},
     title = {A singular problem with {F.\,I.~Frankl'} and {F.~Tricomi} conditions},
     journal = {Doklady Akademii Nauk},
     pages = {24--26},
     publisher = {mathdoc},
     volume = {174},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_174_1_a5/}
}