@article{DAN_1989_305_6_a3,
     author = {I. A. Ibragimov and R. Z. Khas'minskii},
     title = {Asymptotically normal families of experiments, and efficient},
     journal = {Doklady Akademii Nauk},
     pages = {1303--1307},
     publisher = {mathdoc},
     volume = {305},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_305_6_a3/}
}