1. Ince, E.L., Ordinary Differential
Equations, 1920. Translated under the title: Obyknovennye differentsial’nye uravneniya, Kharkov: ONTI
NKTP, 1939.
2. Gromak, V.I., Laine, I., and Shimomura, S., Painlevé Differential Equations in the Complex Plane. Studies in
Mathematics. Vol. 28 , Berlin–New-York: De Gruyter, 2002.
3. Kudryashov, N.A., Analiticheskaya teoriya nelineinykh
differentsial’nykh uravnenii (Analytic Theory of Nonlinear Differential Equations),
Moscow–Izhevsk: Inst. Komp’yut. Issled., 2004.
4. Flashka, H. and Newell, A.C., Monodromy and spectrum preserving
deformations. I, Commun. Math. Phys., 1980, vol. 76,
pp. 65–116.
5. Its, A.R. and Novokshenov, V.Yu., The isomonodromy deformation method in
the theory of Painlevé equations, Lect. Notes
Math., 1986, vol. 1191, pp. 1–93.