@article{ZNSL_2004_310_a4,
     author = {A. I. Nazarov},
     title = {Degenerate {Venttsel'} boundary value problem to elliptic equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {82--97},
     year = {2004},
     volume = {310},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2004_310_a4/}
}