1. Analytic Theory of Continued Fractions;Wall,1948
2. Die Lehre von den Kettenbrüchen;Perron,1913
3. Analytic Theory of Continued Fractions;Jones,1982
4. Continued Fractions: Analytic Theory and Applications;Jones,1980
5. Delle funzioni ipergeometriche e di varie questioni ad esse attinenti;Pincherle;Giorn. Mat. Battaglini,1894