@article{SIGMA_2020_16_a51,
     author = {Claudia Maria Chanu and Giovanni Rastelli},
     title = {On the {Extended-Hamiltonian} {Structure} of {Certain} {Superintegrable} {Systems} on {Constant-Curvature} {Riemannian} and {Pseudo-Riemannian} {Surfaces}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2020},
     volume = {16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2020_16_a51/}
}