1. L. A. Bales, O. A. Karakashian, and S. M. Serbin,On the A 0 -stability of rational approximations to the exponential function with only real poles, BIT, v. 28, 1988, pp. 70–79.
2. L. A. Bales, O. A. Karakashian, and S. M. Serbin,On the stability of rational approximations to the cosine with only imaginary poles, BIT, v. 28, 1988, pp. 652–658.
3. K. Burrage,High order algebraically stable Runge-Kutta methods, BIT, v. 18, 1978, pp. 373–383.
4. K. Burrage, W. H. Hundsdorfer and J. G. Verwer,A study of B-convergence of Runge-Kutta methods, Computing, v. 36, 1986, pp. 17–34.
5. J. C. Butcher,Implicit Runge-Kutta processes, Math. Comp., 18, 1964, pp. 50–64.