@article{ZNSL_1995_221_a1,
     author = {D. E. Apushkinskaya and A. I. Nazarov},
     title = {On the quasilinear stationary {Ventzel} boundary-value problem},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {20--29},
     publisher = {mathdoc},
     volume = {221},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_221_a1/}
}