S. S. Bel'mesova, “Bifurcation of the birth of a closed invariant curve in a one-parameter family of quadratic mappings of the plane”, Izv. Vyssh. Uchebn. Zaved. Mat., 2019, no. 12, 16–24; Russian Math. (Iz. VUZ), 63:12 (2019), 13–20
S. S. Bel'mesova, L. S. Efremova, “A one-parameter family of quadratic maps of a plane including Morse–Smale endomorphisms”, Izv. Vyssh. Uchebn. Zaved. Mat., 2013, no. 8, 80–85; Russian Math. (Iz. VUZ), 57:8 (2013), 70–74
On dynamics of the trace map S. S. Bel'mesova The Seventh International Conference on Differential and Functional Differential Equations August 25, 2014 18:50