1. A. Mendelson, Plasticity: Theory and Application, 1968, Macmillan Company, New York.
2. I. Finnie and W. R. Heller, Creep of Engineering Materials, 1959, McGraw-Hill Book Co. Inc., New York.
3. F. Garofalo, Fundamentals of Creep and Creep Rupture in Metals, 1965, M. Fine, J. Weertman and J. R. Weertman, eds., Macmillan Company, New York.
4. S.P Timoshenko and J. N. Goodier, Theory of Elasticity, 3” Edition, 1970, McGraw-Hill Book Co. Inc., New York.