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• Sáez, Eduardo; Szántó, Iván: Uniqueness of limit cycles bounded by two invariant parabolas. (English). Applications of Mathematics, vol. 57 (2012), issue 5, pp. 521-529
• Sáez, Eduardo; Stange, Eduardo; Szántó, Iván: Coexistence of small and large amplitude limit cycles of polynomial differential systems of degree four. (English). Czechoslovak Mathematical Journal, vol. 57 (2007), issue 1, pp. 105-114
• Lichardová, Hana: Limit cycles in the equation of whirling pendulum with autonomous perturbation. (English). Applications of Mathematics, vol. 44 (1999), issue 4, pp. 271-288
• Gaiko, Valery: Global qualitative investigation, limit cycle bifurcations and Applications of Polynomial Dynamical Systems. (English). In: Došlá, Z., Kuben, J. and Vosmanský, J. (eds.): Proceedings of Equadiff 9, Conference on Differential Equations and Their Applications, Brno, August 25-29, 1997. [Part 3] Papers. Masaryk University, Brno, 1998. pp. 123-130
• Odani, Kenzi: On the limit cycle of the van der Pol equation. (English). In: Došlá, Z., Kuben, J. and Vosmanský, J. (eds.): Proceedings of Equadiff 9, Conference on Differential Equations and Their Applications, Brno, August 25-29, 1997. [Part 3] Papers. Masaryk University, Brno, 1998. pp. 229-235
• Fečkan, Michal: Invariant curves from symmetry. (English). Mathematica Bohemica, vol. 118 (1993), issue 2, pp. 171-174