1. M. Abramovitz and I. A. Stigun (eds.), Handbook of Mathematical Functions, Dover (1964).
2. C. de Boor, ?On local linear functionals which vanish at all B-splines but one,? in: Theory of Approximation with Application, Academic Press, New York (1976).
3. T. Lyche, ?A note on condition numbers of the B-spline bases,? J. Approx. Theory,22, 202?205 (1978).
4. D. K. Kazan, ?On Walli's formula,? Edinburgh Math. Notes, No. 40, 1921 (1956).
5. L. L. Schumaker, Spline Functions: Basic Theory, Wiley, New York (1981).