%0 Journal Article %A Vladimir Jovanović %T A note on the proof of Bertrand's theorem %J Theoretical and applied mechanics %D 2015 %P 27 %V 42 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2298/TAM1501027J/ %R 10.2298/TAM1501027J %G en %F 10_2298_TAM1501027J