1. H. U. Smoltczyk, Approximate Calculation of Shear Deformations beneath a Shallow Foundation, Proceedings of the Fifth Internat. Conf. on Soil Mech. and Foundation Engineering, Paris (1961).
2. V. G. Berezantsev, "Mixed stresses of the bases of deep foundations," Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 5 (1963).
3. V. G. Berezantsev, "Calculation of deep foundations on clay bases," Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 3 (1965).
4. K. Terzaghi, Proceedings of First Internat. Conf. on Soil Mech., Vol. 3, Cambridge (1936).
5. M. A. Eggestad, Proceedings of Fifth Internat. Conf. on Soil Mech. and Foundation Engineering, Paris (1961).