@article{TVP_1976_21_4_a5,
     author = {Yu. A. Ko\v{s}evnik and B. Ya. Levit},
     title = {On a~non-parametric analogue of the information matrix},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {759--774},
     year = {1976},
     volume = {21},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1976_21_4_a5/}
}