1. O. Axelsson,High-order methods for parabolic problems, J. Comp. and Appl. Math. 1 (1975), 5–16.
2. G. A. Baker & J. H. Bramble,The construction and analysis of high-order single-step Galerkin approximations for initial boundary value problems for parabolic equations. Preprint.
3. I. Hlaváček,On a semi-variational method for parabolic equations 1, Apl. Mat. 17 (1972), 327–351.
4. N. R. Nassif,Numerical solution of parabolic problems by the generalized Crank-Nicolson scheme, Calcolo, 12 (1975), 51–61.
5. I. M. Smith, J. L. Siemieniuch & I. Gladwell,A comparison of old and new methods for large systems of ordinary differential equations arising from parabolic partial differential equations, Manchester University, Numerical Analysis Report 13, (1975).