@article{INTO_2017_134_a1,
     author = {M. V. Shamolin},
     title = {Low-dimensional and multi-dimensional pendulums in nonconservative fields. {Part~1}},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {6--128},
     publisher = {mathdoc},
     volume = {134},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2017_134_a1/}
}