@article{DAN_1981_258_2_a0,
     author = {R. Yu. Bentkus and A. R. Kazbaras},
     title = {On optimal statistical estimators of a distribution density},
     journal = {Doklady Akademii Nauk},
     pages = {265--268},
     year = {1981},
     volume = {258},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_258_2_a0/}
}