1. Brachtendorf HG (1994) Simulation des eingeschwungenen Verhaltens elektronischer Schaltungen. Shaker, Aachen
2. Brachtendorf HG (1997) On the relation of certain classes of ordinary differential algebraic equations with partial differential algebraic equations. Technical Report 1131G0-791114-19TM, Bell-Laboratories
3. Brachtendorf HG, Laur R (2000) Multi-rate PDE methods for high Q oscillators. In: Mastorakis N (ed) Problems in modern applied mathematics. World Scientific, Athen, pp 391–298, July 2000. CSCC 2000, MCP 2000, MCME 2000 Multi-conference
4. Brachtendorf HG, Welsch G, Laur R, Bunse-Gerstner A (1996) Numerical steady state analysis of electronic circuits driven by multi-tone signals. Electron Eng 79(2): 103–112
5. Pulch R (2003) Finite difference methods for multi time scale differential algebraic equations. Z Angew Math Mech 83(9): 571–583