1. J.L.Sanders, Jr. Journal of Applied Mechanics, 27, 2, 1960, p.352.
2. K.Wolf Zeitschrift für angewandte Mathematik and Mechanck, 3, 2, 1923, p.107.
3. A.A.Griffith Philosophical Transactions of the Royal Society (London), Series A, 221, 1921, p.163.
4. S.Timoshenko and J.N.Goodier Theory of Elasticity, McGraw-Hill Book Co., Inc., New York, 2nd Edition, 1951, Chapter 7.
5. C.E.Inglis Transactions of the Institute of Naval Architects (London), 60, 1913, p.219.