@article{DAN_1983_271_3_a7,
     author = {I. S. Ukolov and V. V. Bek and A. R. Makhlin},
     title = {Optimal estimation and optimal identification of nonlinear},
     journal = {Doklady Akademii Nauk},
     pages = {550--553},
     publisher = {mathdoc},
     volume = {271},
     number = {3},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_271_3_a7/}
}