Incomplete Data problems in X-Ray Computerized Tomography. II. Truncated Projections and Region-of-Interest Tomography. Alfred K. Louis, Andreas Rieder (1989/1990) Numerische Mathematik
Incomplete Data Problems in X-Ray Computerized Tomography. I. Singular Value Decomposition of the Limited Angle Transform. Alfred K. Louis (1986) Numerische Mathematik