@article{DAN_1973_209_2_a13,
     author = {V. A. Yakubovich},
     title = {Necessary and sufficient conditions for absolute stability under certain types of quadratic constraints},
     journal = {Doklady Akademii Nauk},
     pages = {312--315},
     publisher = {mathdoc},
     volume = {209},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_209_2_a13/}
}