@article{MZM_1990_47_6_a22,
     author = {Sh. A. Khashimov},
     title = {Nonparametric estimation for derivatives of probability density and the regression function},
     journal = {Matemati\v{c}eskie zametki},
     pages = {148--150},
     year = {1990},
     volume = {47},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_6_a22/}
}