1. Casseis, J.W.S. An Introduction to the Geometry of Numbers, Berlin-Heidelberg-New York Springer 1971
2. Davis, P.J. — Rabinowitz, P. Methods of Numerical Integration, New York-San Francisco-London Academic Press (1975)
3. Freeden, W. Eine Verallgemeinerung der Hardy-Landauschen Identität, Manuscripta math., 24, 205–216 (1978)
4. Freeden, W. — Reuter, R. A Class of Multidimensional Periodic Splines, Manuscripta math., 35, 371–386 (1981)
5. Ivanov, V.K. Multidimensional Generalizations of Euler Summation Formula (Russian), Izvestija VUZ, Matematika, 37, No. 6, 72–80 (1963)