1. NLR TP;A.A. ten Dam,1989
2. L. Petzold, Differential/algebraic equations are not ODEs. SIAM J. Sci. Stat. Comp. 3 (1982) 312?321.
3. C.W. Gear and L.R. Petzold, ODE methods for the solution of differential/ algebraic systems. SIAM Journals of Numerical Analysis 21 (4) (1984) 716?728.
4. DFVLR Forschungsbericht;C. Fuehrer,1989
5. L. Petzold, A description of DASSL: a differential/algebraic system solver. In: Proc. 10th IMACS world Congress, August 8?13, Montreal (1982).