@article{ND_2024_20_4_a1,
     author = {A. P. Markeev},
     title = {On {Vibrations} of a {Heavy} {Material} {Point} in a {Fixed} {Ellipsoidal} {Bowl}},
     journal = {Russian journal of nonlinear dynamics},
     pages = {449--461},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ND_2024_20_4_a1/}
}