1. Ordinary Differential Equations;Birkhoff,1989
2. The matrix functional equation y′(x)=Ay(λx)+By(x);Carr;Proc. Roy. Soc. Edinburgh Sect. A,1975
3. The pantograph equation in the complex plane;Derfel;J. Math. Anal. Appl.,1997
4. An Introduction to Chaotic Dynamical Systems;Devaney,1989
5. Complex Dynamical Systems, the Mathematics behind the Mandelbrot and Julia Sets,1994