%0 Journal Article %A D. A. Fedoseev %T Bifurcation diagrams of natural Hamiltonian systems on Bertrand manifolds %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2015 %P 62-65 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2015_1_a11/ %G ru %F VMUMM_2015_1_a11