@techreport {Schuele-et-al-03,
	title = {Discrete Tomography By Convex-Concave Regularization and D.C.~Programming},
	number = {15},
	year = {2003},
	note = {\em Discr.~Appl.~Math.\/, accepted for publication},
	institution = {Dept.~Math.~and Comp.~Science}
}
