@article{10_4171_dm_36,
     author = {Peter Heinzner},
     title = {The minimum principle from a {Hamiltonian} point of view},
     journal = {Documenta mathematica},
     pages = {1--14},
     year = {1998},
     volume = {3},
     doi = {10.4171/dm/36},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/36/}
}