@article{TMF_1981_46_2_a9,
     author = {L. L. Buishvili and E. B. Volzhan and M. G. Menabde},
     title = {Higher approximations in the theory of the average {Hamiltonian}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {251--262},
     publisher = {mathdoc},
     volume = {46},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1981_46_2_a9/}
}