资讯

Robert E. Greenwood, Numerical Integration for Linear Sums of Exponential Functions, The Annals of Mathematical Statistics, Vol. 20, No. 4 (Dec., 1949), pp. 608-611 ...
Alexandru Aleman, José Ángel Peláez, Spectra of Integration Operators and Weighted Square Functions, Indiana University Mathematics Journal, Vol. 61, No. 2 (2012), pp. 775-793 ...