%0 Journal Article %A Christian Carimalo %T Transmutation of central forces and Bertrand's theorem %J Theoretical and applied mechanics %D 2023 %P 1 %V 50 %N 1 %U http://geodesic.mathdoc.fr/articles/10.2298/TAM220602001C/ %R 10.2298/TAM220602001C %G en %F 10_2298_TAM220602001C