@article{ARM_2006__42_5_a20,
     author = {Smetanov\'a, Dana},
     title = {On second order {Hamiltonian} systems},
     journal = {Archivum mathematicum},
     pages = {341--347},
     publisher = {mathdoc},
     volume = {42},
     number = {5},
     year = {2006},
     mrnumber = {2322420},
     zbl = {1164.35304},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2006__42_5_a20/}
}