Jaume Llibre, Chara Pantazi, “Counterexample to a Conjecture on the Algebraic Limit Cycles of Polynomial Vector Fields”, Geom Dedicata, 110, № 1, 2005, 213
JAUME GINÉ, “ON THE CENTERS OF PLANAR ANALYTIC DIFFERENTIAL SYSTEMS”, Int. J. Bifurcation Chaos, 17, № 09, 2007, 3061
Jaume Llibre, Marco Antonio Teixeira, “Limit cycles for m-piecewise discontinuous polynomial Liénard differential equations”, Z. Angew. Math. Phys., 66, № 1, 2015, 51
Robert Roussarie, Dana Schlomiuk, “On the geometric structure of the class of planar quadratic differential systems”, Qual. Th. Dyn. Syst., 3, № 1, 2002, 93
JOAN C. ARTÉS, JAUME LLIBRE, DANA SCHLOMIUK, “THE GEOMETRY OF QUADRATIC POLYNOMIAL DIFFERENTIAL SYSTEMS WITH A WEAK FOCUS AND AN INVARIANT STRAIGHT LINE”, Int. J. Bifurcation Chaos, 20, № 11, 2010, 3627
Pavao Mardesic, M Resman, “Аналитические модули для параболических ростков Дюлака”, Успехи математических наук, 76, № 3(459), 2021, 13
JIBIN LI, H. S. Y. CHAN, K. W. CHUNG, “INVESTIGATIONS OF BIFURCATIONS OF LIMIT CYCLES IN Z2-EQUIVARIANT PLANAR VECTOR FIELDS OF DEGREE 5”, Int. J. Bifurcation Chaos, 12, № 10, 2002, 2137
Jaume Llibre, Jiang Yu, Xiang Zhang, “On the Limit Cycles of the Polynomial Differential Systems with a Linear Node and Homogeneous Nonlinearities”, Int. J. Bifurcation Chaos, 24, № 05, 2014, 1450065
JOAN C. ARTÉS, JAUME LLIBRE, DANA SCHLOMIUK, “THE GEOMETRY OF QUADRATIC DIFFERENTIAL SYSTEMS WITH A WEAK FOCUS OF SECOND ORDER”, Int. J. Bifurcation Chaos, 16, № 11, 2006, 3127
R. R. Gontsov, I. V. Goryuchkina, “Convergence of formal Dulac series satisfying an algebraic ordinary differential equation”, Sb. Math., 210, № 9, 2019, 1207