@article{ISU_2022_22_2_a2,
     author = {V. Sh. Roitenberg},
     title = {On generation of a limit cycle from a separatrix loop of a sewn saddle-node},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {159--168},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2022_22_2_a2/}
}