%0 Journal Article %A Bondy, J. A. %T Variations on the Hamiltonian Theme %J Canadian mathematical bulletin %D 1972 %P 57-62 %V 15 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-012-3/ %R 10.4153/CMB-1972-012-3 %F 10_4153_CMB_1972_012_3