Geodesic
Hamiltonian methods of Runge–Kutta type and their variational interpretation
Matematičeskoe modelirovanie, Tome 2 (1990) no. 4, pp. 78-87 
Yu. B. Suris. Hamiltonian methods of Runge–Kutta type and their variational interpretation. Matematičeskoe modelirovanie, Tome 2 (1990) no. 4, pp. 78-87. http://geodesic.mathdoc.fr/item/MM_1990_2_4_a6/
@article{MM_1990_2_4_a6,
     author = {Yu. B. Suris},
     title = {Hamiltonian methods of {Runge{\textendash}Kutta} type and their variational interpretation},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {78--87},
     year = {1990},
     volume = {2},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1990_2_4_a6/}
}
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Numerical Methods of canonical type for solution of Hamilton systems are constructed. Discrete analogue of principle of least action is proved.