@inbook {SC.5.Mardal.2003.b,
	title = {Block Preconditioning and Systems of PDEs},
	booktitle = {Advanced Topics in Computational Partial Differential Equations - Numerical Methods and Diffpack Programming},
	series = {Lecture Notes in Computational Science and Engineering},
	year = {2003},
	pages = {199-236},
	publisher = {Springer},
	organization = {Springer},
	author = {Mardal, Kent-Andre and Sundnes, Joakim and Hans Petter {Langtangen} and Tveito, Aslak},
	editor = {Hans Petter {Langtangen} and Tveito, Aslak}
}
