@article{ZNSL_1974_42_a4,
     author = {M. V. Buslaeva},
     title = {On the {Root} {Subspace} of the {Contraction} {Generated} by the {Internal} {Function}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {78--84},
     year = {1974},
     volume = {42},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1974_42_a4/}
}