Rosales-Gonzalez E., “On Rigidity of Germs of Holomorphic Dicritic Foliations and Formal Normal Forms.”, Singularities in Geometry and Topology, 2005, eds. Brasselet J., Damon J., Trang L., Oka M., World Scientific Publ Co Pte Ltd, 2007, 705–722
Helena Reis, “Equivalence and semi-completude of foliations”, Nonlinear Analysis: Theory, Methods & Applications, 64:8 (2006), 1654
L. Ortiz-Bobadilla, E. Rosales-González, S. M. Voronin, “Rigidity Theorem for Degenerated Singular Points of Germs of Holomorphic Vector Fields in the Complex Plane”, Journal of Dynamical and Control Systems, 7:4 (2001), 553
Gong X., “Conformal Maps, Monodromy Transformations, and Non-Reversible Hamiltonian Systems”, Math. Res. Lett., 7:4 (2000), 471–476
М. Я. Житомирский, “Вырождения дифференциальных 1-форм и структур Пфаффа”, УМН, 46:5(281) (1991), 47–78 ; M. Ya. Zhitomirskii, “Degeneracies of differential 1-forms and Pfaffian structures”, Russian Math. Surveys, 46:5 (1991), 53–90
С. И. Трифонов, “Расходимость рядов Дюлака”, Матем. сб., 181:1 (1990), 37–56 ; S. I. Trifonov, “Divergence of Dulac's rows”, Math. USSR-Sb., 69:1 (1991), 37–56
Dixon P., Esterle J., “Michael Problem and the Poincaré-Fatou-Bieberbach Phenomenon”, Bull. Amer. Math. Soc., 15:2 (1986), 127–187
Ю. С. Ильяшенко, “Мемуар Дюлака “О предельных циклах” и смежные вопросы локальной теории дифференциальных уравнений”, УМН, 40:6(246) (1985), 41–78 ; Yu. S. Ilyashenko, “Dulac's memoir “On limit cycles” and related problems of the local theory of differential equations”, Russian Math. Surveys, 40:6 (1985), 1–49
П. М. Елизаров, “Орбитальная аналитическая неэквивалентность седловых резонансных векторных полей в ($\mathbf C^2,0$)”, Матем. сб., 123(165):4 (1984), 534–548 ; P. M. Elizarov, “Orbital analytic nonequivalence of saddle resonance vector fields in $(\mathbf C^2,0)$”, Math. USSR-Sb., 51:2 (1985), 533–547
Martinet J., Ramis J., “Analytical Classification of 1st-Order Resonant Non-Linear Differential-Equations”, Ann. Sci. Ec. Norm. Super., 16:4 (1983), 571–621