@article{ZNSL_1986_149_a1,
     author = {V. I. Vasyunin and N. G. Makarov},
     title = {On quasi-similarity of model contractions with non-equal defects},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {24--37},
     publisher = {mathdoc},
     volume = {149},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1986_149_a1/}
}