@article{10_21136_AM_1987_104278,
     author = {Feireisl, Eduard},
     title = {Small time-periodic solutions to a nonlinear equation of a vibrating string},
     journal = {Applications of Mathematics},
     pages = {480--490},
     publisher = {mathdoc},
     volume = {32},
     number = {6},
     year = {1987},
     doi = {10.21136/AM.1987.104278},
     mrnumber = {0916063},
     zbl = {0653.35063},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1987.104278/}
}