@article{DAN_1972_204_1_a3,
     author = {I. A. Ibragimov and R. Z. Khas'minskii},
     title = {On sequential invariant estimation of a shift parameter},
     journal = {Doklady Akademii Nauk},
     pages = {18--20},
     publisher = {mathdoc},
     volume = {204},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_204_1_a3/}
}