1. On the number of solutions of the equation dx/dt=∑j=0naj(t)xj,0≤t≤1, for which x(0)=x(1);Neto;Invent. Math.,1980
2. From Abel’s differential equations to Hilbert’s sixteenth problem;Gasull;Butl. Soc. Catalana Mat.,2013
3. Variety of Poincaré mappings for cubic equations with variable coefficients;Panov;Funct. Anal. Appl.,1999
4. Nonlocal Problems of the Theory of Oscillations;Pliss,1966
5. Limit cycles for a class of Abel equations;Gasull;SIAM J. Math. Anal.,1990