1. N. I. Achieser,Theory of Approximation (Frederich Unger Publishing Co., New York 1956).
2. N. A. Slezkin,Dynamics of Viscous Incompressible Fluids (in Russian) (Gostekhizdat, Moscow 1955).
3. E. Jahnke andF. Emde,Tables of Functions, 4th ed. (Dover Publ., New York 1945).