@article{CMFD_2013_48_a0,
     author = {H.-O. Walther},
     title = {Evolution systems for differential equations with variable time lags},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {5--26},
     publisher = {mathdoc},
     volume = {48},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2013_48_a0/}
}