1. Essentials of Padé Approximants;Baker,1975
2. Formes linéaires et polynômes orthogonaux semiclassiques de classe s = 1, Description et classification;Belmehdi,1990
3. Padé-type Approximants and General Orthogonal Polynomials;Brezinski,1980
4. R.S. Chihara, On quasiorthogonal polynomials, Proc. Amer. Math. Soc. 8 765–767.
5. Simultaneous Padé approximation and orthogonality;de Bruin,1985