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@article{DE_1968_4_11_a11, author = {V. P. Prokop'ev}, title = {On the stability of systems with aftereffect in the critical case of two zero roots}, journal = {Differencialʹnye uravneni\^a}, pages = {2027--2033}, publisher = {mathdoc}, volume = {4}, number = {11}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_11_a11/} }
V. P. Prokop'ev. On the stability of systems with aftereffect in the critical case of two zero roots. Differencialʹnye uravneniâ, Tome 4 (1968) no. 11, pp. 2027-2033. http://geodesic.mathdoc.fr/item/DE_1968_4_11_a11/