@article{ZNSL_1998_248_a10,
     author = {M. N. Yakovlev},
     title = {Implicit functions determined by equations with unbounded operators and the solvability of operator equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {216--224},
     publisher = {mathdoc},
     volume = {248},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1998_248_a10/}
}