@inbook {VavaYe:indicator,
	title = {On the relationship between layered least squares and affine scaling steps},
	booktitle = {Lectures in Applied Mathematics, volume 32},
	year = {1996},
	publisher = {American Mathematical Society},
	organization = {American Mathematical Society},
	address = {Providence, RI},
	author = {S. A. Vavasis and Y. Ye}
}