@article{DAN_1971_200_5_a3,
     author = {L. B. Klebanov and Yu. V. Linnik and A. L. Rukhin},
     title = {Unbiased estimation and matrix loss functions},
     journal = {Doklady Akademii Nauk},
     pages = {1024--1025},
     year = {1971},
     volume = {200},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_200_5_a3/}
}