References
- On pseudo-Chebyshev subspaces in normed linear spaces, to appear H., Mohebi
- Duke Math. J. v.35 Metric projictions onto subspaces of finite codimension P.D., Morris
- Real and complex analysis W., Rudin
- Acta. Sci. Math. v.147 Caracterisation des elements de meilleure approximation dans un espace de Banach quelconque I., Singer
- Regional Conference Series in Applied Mathemaics v.13 The theory of best approximation and functional analysis I., Singer
- Best approxmation in normed spaces by elements of linear subspaces I., Singer