@article{10_21136_CMJ_1982_101819,
     author = {Ha\v{s}\v{c}\'ak, Alexander and \v{S}vec, Marko},
     title = {Integral equivalence of two systems of differential equations},
     journal = {Czechoslovak Mathematical Journal},
     pages = {423--436},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1982},
     doi = {10.21136/CMJ.1982.101819},
     mrnumber = {669785},
     zbl = {0515.34025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101819/}
}