@article{10_21136_CMJ_1971_101055,
     author = {Krylov\'a, Nad\v{e}\v{z}da and Vejvoda, Otto},
     title = {A linear and weakly nonlinear equation of a beam: the boundary-value problem for free extremities and its periodic solutions},
     journal = {Czechoslovak Mathematical Journal},
     pages = {535--566},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1971},
     doi = {10.21136/CMJ.1971.101055},
     mrnumber = {0289918},
     zbl = {0226.35008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101055/}
}