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@article{DE_1987_23_11_a20, author = {A. L. Lebedev}, title = {Ideal observability of discrete systems with delay}, journal = {Differencialʹnye uravneni\^a}, pages = {1998--2001}, publisher = {mathdoc}, volume = {23}, number = {11}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_11_a20/} }
A. L. Lebedev. Ideal observability of discrete systems with delay. Differencialʹnye uravneniâ, Tome 23 (1987) no. 11, pp. 1998-2001. http://geodesic.mathdoc.fr/item/DE_1987_23_11_a20/