@article{TRSPY_2007_256_a7,
     author = {N. B. Zhuravlev and A. L. Skubachevskii},
     title = {Hyperbolicity of {Periodic} {Solutions} of {Functional} {Differential} {Equations} with {Several} {Delays}},
     journal = {Informatics and Automation},
     pages = {148--171},
     publisher = {mathdoc},
     volume = {256},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2007_256_a7/}
}