@article{10_21136_CMJ_1994_128476,
     author = {Chrastina, Jan},
     title = {On the equivalence of variational problems. {III}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {535--560},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1994},
     doi = {10.21136/CMJ.1994.128476},
     mrnumber = {1288171},
     zbl = {0866.49014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128476/}
}