@article{UZMU_1956_181_181_a3,
     author = {L. \`E. \`El'sgol'ts},
     title = {On the integration of linear partial differential equations with retarded argument},
     journal = {Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta},
     pages = {57--58},
     publisher = {mathdoc},
     volume = {181},
     number = {181},
     year = {1956},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZMU_1956_181_181_a3/}
}