1. G.N. Savin, Stress Concentration Around Holes, Pergamon Press (1961) 69–73.
2. C. Paris and G. Sih, ASTM STP 381 (1965) 34.
3. G. Kolossoff, Zeitschrift Mathematic und Physik 62 (1914) 383–409.
4. G. Kolossoff, Doctoral Dissertation, Dorpat (1909).
5. N.I. Muskhelishvili, Some Basic Problems of Mathematical Theory of Elasticity, Noordhoff, Groningen, Holland (1953).