@article{SVFU_2023_30_3_a5,
     author = {V. Sh. Roitenberg},
     title = {Bifurcations of a polycycle formed by separatrices of a saddle with zero saddle value of a dynamical system with central symmetry},
     journal = {Matemati\v{c}eskie zametki SVFU},
     pages = {67--77},
     year = {2023},
     volume = {30},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SVFU_2023_30_3_a5/}
}