@article{MAN_1981__255_182849,
     author = {Antonio Ambrosetti and Giovanni Mancini},
     title = {Solutions of {Minimal} {Period} for a {Class} of {Convex} {Hamiltonian} {Systems.}},
     journal = {Mathematische Annalen},
     pages = {405--422},
     publisher = {mathdoc},
     volume = {255},
     year = {1981},
     zbl = {0466.70022},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__255_182849/}
}