@article {SC.4.Bruaset.1997,
	title = {Object-Oriented Design of Preconditioned Iterative Methods in Diffpack},
	journal = {ACM Transactions on Mathematical Software},
	volume = {23},
	number = {1},
	year = {1997},
	pages = {50-80,},
	author = {Are Magnus {Bruaset} and Hans Petter {Langtangen}}
}
