1. P. L. Chebyshev, ?The theory of mechanisms known under the name of parallelograms,? in: Complete Collected Works [in Russian], Vol. II, Moscow-Leningrad (1947), pp. 23?51.
2. P. L. Chebyshev, ?On interpolation in the case of a large number of data furnished by the observations,? in: Complete Collected Works [in Russian], Vol. II, Moscow-Leningrad (1947), pp. 244?313.
3. E. I. Zolotarev, ?On a problem on minimal quantities,? in: Complete Collected Works [in Russian], No. 2, Leningrad (1932), pp. 130?166.
4. N. I. Akhiezer, Theory of Approximations, F. Ungar, New York (1956).
5. I. M. Vinogradov, The Method of Trigonometric Sums in the Theory of Numbers [in Russian], Moscow (1971).