@article{TAM_2023_50_1_a1,
     author = {Christian Carimalo},
     title = {Transmutation of central forces and {Bertrand's} theorem},
     journal = {Theoretical and applied mechanics},
     pages = {1 - 11},
     publisher = {mathdoc},
     volume = {50},
     number = {1},
     year = {2023},
     url = {http://geodesic.mathdoc.fr/item/TAM_2023_50_1_a1/}
}