1. Antoulas, A.C.: Approximation of Large-Scale Dynamical Systems. SIAM, Philadelphia (2005)
2. Baker Jr., G.: Essentials of Padé Approximants. Academic Press, London (1975)
3. Bernlohr, C.R.: Continued fractions and the Riccati equation: an annotated translation of Euler, M.A.??thesis, Ohio State University (1985);
4. An annotated translation of [10]. The summation of a continued fraction whose indices constitute an arithmetic progression while all numerators are ones; Also a solution of the Riccati equation is taught through such fractions
5. Brezinski, C.: Padé-Type Approximation and General Orthogonal Polynomials. Birkhäuser Verlag, Basel (1980)