@article{TMF_2022_211_2_a8,
     author = {I. Yu. Polekhin},
     title = {The~existence proof for forced oscillations by adding dissipative forces in the~example of a~spherical pendulum},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {295--305},
     publisher = {mathdoc},
     volume = {211},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2022_211_2_a8/}
}