@article{10_2298_TAM220602001C,
     author = {Christian Carimalo},
     title = {Transmutation of central forces and {Bertrand's} theorem},
     journal = {Theoretical and applied mechanics},
     pages = {1 },
     year = {2023},
     volume = {50},
     number = {1},
     doi = {10.2298/TAM220602001C},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/TAM220602001C/}
}