1. A collocation method for parabolic quasilinear problems on general domains;Ascher,1977
2. Application of mathematical programming to l1 approximations;Barrodale,1970
3. A moment problem in L1 approximation;Hobby,1965
4. Best L1 approximation by weak chebyshev systems and the uniqueness of interpolating perfect splines;Micchelli;J. Approximation Theory,1977
5. A. Pinkus, private communication.