@article{SIGMA_2015_11_a93,
     author = {Claudia Maria Chanu and Luca Degiovanni and Giovanni Rastelli},
     title = {Extended {Hamiltonians,} {Coupling-Constant} {Metamorphosis} and the {Post{\textendash}Winternitz} {System}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2015},
     volume = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2015_11_a93/}
}