@article{ZNSL_1977_69_a16,
     author = {A. G. Khachatryan},
     title = {Overdetermined parabolic boundary-value problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {240--272},
     year = {1977},
     volume = {69},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_69_a16/}
}