Jaume Llibre, Chara Pantazi, “Counterexample to a Conjecture on the Algebraic Limit Cycles of Polynomial Vector Fields”, Geom Dedicata, 110, no. 1, 2005, 213
JAUME GINÉ, “ON THE CENTERS OF PLANAR ANALYTIC DIFFERENTIAL SYSTEMS”, Int. J. Bifurcation Chaos, 17, no. 09, 2007, 3061
Jaume Llibre, Marco Antonio Teixeira, “Limit cycles for m-piecewise discontinuous polynomial Liénard differential equations”, Z. Angew. Math. Phys., 66, no. 1, 2015, 51
Robert Roussarie, Dana Schlomiuk, “On the geometric structure of the class of planar quadratic differential systems”, Qual. Th. Dyn. Syst., 3, no. 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, no. 11, 2010, 3627
Pavao Mardesic, M Resman, “Аналитические модули для параболических ростков Дюлака”, Успехи математических наук, 76, no. 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, no. 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, no. 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, no. 11, 2006, 3127
R. R. Gontsov, I. V. Goryuchkina, “Convergence of formal Dulac series satisfying an algebraic ordinary differential equation”, Sb. Math., 210, no. 9, 2019, 1207