1. Automatic controlled precision calculations;Chartres;J. Assoc. Comput. Mach.,1966
2. Interval arithmetic in matrix computations, part I;Hansen;SIAM J. Num. Anal.,1965
3. Interval arithmetic in matrix computations, part II;Hansen;SIAM J. Num. Anal.,1967
4. Approximate Linear Algebraic Equations and Rounding Error estimation;Kuperman,1967
5. On the solution set of a linear system with inaccurate coefficients;Oettli;SIAM J. Num. Anal.,1965