Constructive approaches to mathematical models : proceedings of a conference in honor of R. J. Duffin, Pittsburgh, PA, 10-14 July, 1978 / edited by C. V. Coffman and G. J. Fix.
Constructive approaches to mathematical models : proceedings of a conference in honor of R. J. Duffin, Pittsburgh, PA, 10-14 July, 1978 / edited by C. V. Coffman and G. J. Fix.