1. A. Kratzer and W. Franz, Transcendental Functions [Russian translation], IL, Moscow, 1963.
2. V. D. Kupradze, Methods of the Potential in the Theory of Elasticity [in Russian], Fizmatgiz, Moscow, 1963.
3. R. D. Mindlin and G. F. Tirsten, ?Effects of moment stresses in the linear theory of elasticity,? collection: Mekhanika, No. 4 [Russian translation], 1964.
4. G. N. Savin, Fundamentals of the Problem of the Moment Theory of Elasticity [in Russian]. Izd. Kievskogo gos. un-ta, Kiev, 1965.