- Luiz F.S. Gouveia, Joan Torregrosa, “24 crossing limit cycles in only one nest for piecewise cubic systems”, Applied Mathematics Letters, 103, 2020, 106189
- A. A. Grin’, “Reduction to transversality of curves in the construction of a Dulac function”, Diff Equat, 42, № 6, 2006, 896
- Jaume Llibre, Marcelo Messias, Alisson C. Reinol, “Normal forms and global phase portraits of quadratic and cubic integrable vector fields having two nonconcentric circles as invariant algebraic curves”, Dynamical Systems, 32, № 3, 2017, 374
- Nikolai Vavilov, “Reshaping the metaphor of proof”, Phil. Trans. R. Soc. A., 377, № 2140, 2019, 20180279
- Lubomir Gavrilov, Iliya D. Iliev, “Perturbations of quadratic Hamiltonian two-saddle cycles”, Ann. Inst. H. Poincaré Anal. Non Linéaire, 32, № 2, 2015, 307
- Stefano Cardanobile, Stefan Rotter, “Multiplicatively interacting point processes and applications to neural modeling”, J Comput Neurosci, 28, № 2, 2010, 267
- Jackson Itikawa, Regilene Oliveira, Joan Torregrosa, “First-order perturbation for multi-parameter center families”, Journal of Differential Equations, 309, 2022, 291
- D. Rojas, J. Villadelprat, “A criticality result for polycycles in a family of quadratic reversible centers”, Journal of Differential Equations, 264, № 11, 2018, 6585
- Ali Bakhshalizadeh, Jaume Llibre, “Limit cycles of piecewise differential equations on the cylinder”, Bulletin des Sciences Mathématiques, 170, 2021, 103013
- Valery A. Gaiko, “A quadratic system with two parallel straight-line-isoclines”, Nonlinear Analysis: Theory, Methods & Applications, 71, № 11, 2009, 5860