@article{MZM_1997_62_2_a5,
     author = {G. I. Ivchenko and S. A. Khonov and E. A. Ivanov},
     title = {Exact maximum likelihood estimator of the structure of a stratified population},
     journal = {Matemati\v{c}eskie zametki},
     pages = {216--222},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_62_2_a5/}
}