Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KUKTF_1977_a4, author = {A. L. Kuz'mina}, title = {Conditions for positiveness of integral quadratic forms}, journal = {Konstruktivnaya Teoriya Funktsii i Funktsional'nyi Analiz}, pages = {33--36}, publisher = {mathdoc}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KUKTF_1977_a4/} }
A. L. Kuz'mina. Conditions for positiveness of integral quadratic forms. Konstruktivnaya Teoriya Funktsii i Funktsional'nyi Analiz, Konstruktivnaya Teoriya Funktsii i Funktsional'nyi Analiz (1977), pp. 33-36. http://geodesic.mathdoc.fr/item/KUKTF_1977_a4/
[1] Sirazetdinov T. K., “Metod funktsii Lyapunova v zadachakh upravleniya sistemami s raspredelennymi parametrami (obzor)”, Avtomatika i telemekhanika, 1972, no. 7, 5–21 | MR
[2] Trikomi F., Integralnye uravneniya, IL, M., 1960