1. N.I. Muskhelishvili, Some Basic Problems of the Mathematical Theory of Elasticity, translation by J.R.M. Radok, Noordhoff, Groningen (1975).
2. N.I. Muskhelishvili, Singular Integral Equations, translated by J.R.M. Radok, Noordhoff, Groningen, Holland (1953).
3. M. Abramowitz and I.A. Stegun, Handbook of Mathematical Functions, Dover Publications, Inc., New York (1972).