@article{DE_2004_40_10_a9,
     author = {Z. M. Zainulabidova},
     title = {A boundary value problem for equations whose order degenerates along the perpendicular lines of change of type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1374--1378},
     publisher = {mathdoc},
     volume = {40},
     number = {10},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_10_a9/}
}