1. L. A. Kalyakin and M. A. Shamsutdinov, Autoresonant asymptotics in an oscillating system with weak dissipation” [in Russian], Teor. Mat. Fiz. 160, No. 1, 102–111 (2009); English transl.: Theor. Math. Phys. 160, No. 1, 960–967 (2009).
2. S. Glebov, O. Kiselev, and N. Tarkhanov, “Autoresonance in a dissipative system,” J. Phys. A: Math. Theor. 43, 215203 (2010).
3. J. Fajans and L. Friedland, “Autoresonant (nonstationary) excitation of pendulums, Plutinos, plasmas, and other nonlinear oscillators,” Am. J. Phys. 69, 1096–1102 (2001).
4. A. N. Kuznetsov, “Existence of solutions entering at a singular point of an autonomous system having a formal solution” [in Russian], Funkts. Anal. Pril. 23, No. 4, 63–74 (1989); English transl.: Funct. Anal. Appl. 23, No. 4, 308–317 (1989).
5. L. A. Kalyakin, “Existence theorems and estimates of solutions for equations of principal resonance” [in Russian], Sovrem. Mat. Pril. 85, 73–83 (2012); English transl.: J. Math. Sci., New York 200, No. 1, 82–95 (2014).