@article{DE_1968_4_1_a3,
     author = {I. V. Maiorov},
     title = {A problem of {Frankl'} for a nonlinear equation of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {46--51},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_1_a3/}
}