1. R. Freund and N. Nachtigal. QMR: a quasi-minimal residual method for non-Hermitian linear systems. Numer. Math. vol. 60 (1991), no. 3, p. 315–340.
2. E. Hairer, S. Nørsett and G. Wanner. Solving Ordinary Differential Equations I, Nonstiff Problems. Second edition, Springer-Verlag, 1993.
3. Solving Ordinary Differential Equations II, Stiff and Differential-Algebraic Problems. Springer-Verlag, 1991.
4. S. Nørsett and P. Thomson. Embedded SDIRK-Methods of basic order three. BIT, vol. 24 (1984), no. 4, p.634–646.
5. S. Nørsett and P. Thomsen. Displacement or Residual Test in the Application of Implicit Methods for Stiff Problems. IMA J. of Numerical Analysis, 1985, no. 5, p. 297–305.