@article{10_21136_MB_1993_125932,
     author = {Krupkov\'a, Olga},
     title = {On the inverse problem of the calculus of variations for ordinary differential equations},
     journal = {Mathematica Bohemica},
     pages = {261--276},
     publisher = {mathdoc},
     volume = {118},
     number = {3},
     year = {1993},
     doi = {10.21136/MB.1993.125932},
     mrnumber = {1239121},
     zbl = {0786.58012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1993.125932/}
}