@article{DE_2003_39_11_a13,
     author = {I. A. Rudakov},
     title = {A {Time-Periodic} {Solution} of the {Equation} of {Forced} {Vibrations} of a {String} with {Homogeneous} {Boundary} {Conditions}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1550--1555},
     publisher = {mathdoc},
     volume = {39},
     number = {11},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_11_a13/}
}