Vieweg
Notes on Numerical Fluid Mechanics
Annual Meeting of the Gesellschaft fur Angewandte Mathematik und Mechanik
Modelling, Analysis and Computation

de Zeeuw, P. (1993). Incomplete line $LU$ as smoother and as preconditioner. Incomplete Decomposition (ILU) - Algorithms, Theory, and Applications. Proceedings of the Eighth GAMM-Seminar., 215–224.