@article{BASM_2008_1_a7,
     author = {E. A. Grebenikov},
     title = {Two problems from the qualitative theory of {Hamiltonian} systems},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {131--138},
     publisher = {mathdoc},
     number = {1},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/BASM_2008_1_a7/}
}