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2. Abramowitz, M and Segun, I. A., Handbook of Mathematical Functions. Dover Publications, New York 1965
3. Bowden, F. P. and Tabor, D., The friction and lubrication of solids, Part II. Oxford Univ. Press, Oxford 1964
4. Byrd, P. F. and Friedman, M. D., Handbook of elliptic integrals for engineers and physicists. Springer Berlin 1954
5. Galin, L. A., Pressure of a punch with friction and cohesive domains. Prikl. Mat. Mekh. 9 (1945) 413?424 (Also in Contact problems in the theory of elasticity, ed. I. N. Sneddon. North Carolina State College Dep. Math. Report 1961)