@article{DE_2004_40_4_a6,
     author = {G. L. Kharatishvili and T. A. Tadumadze},
     title = {Formulas for the {Variation} of the {Solution} of a {Differential} {Equation} with {Retarded} {Arguments} and with a {Continuous} {Initial} {Condition}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {500--508},
     publisher = {mathdoc},
     volume = {40},
     number = {4},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_4_a6/}
}