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@article{TM_1970_111_a11, author = {S. M. Ermakov}, title = {The optimal unbiased plans of regression experiments}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {252--257}, publisher = {mathdoc}, volume = {111}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1970_111_a11/} }
S. M. Ermakov. The optimal unbiased plans of regression experiments. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Теоретические задачи математической статистики, Tome 111 (1970), pp. 252-257. http://geodesic.mathdoc.fr/item/TM_1970_111_a11/