A. A. Levshin, “On one mixed problem of the theory of elasticity for an anisotropic halfplane,” Izv. Akad. Nauk SSSR, Mekh. Tverd. Tela, No. 25, 180–182 (1981).
S. G. Lekhnitskii, Theory of Elasticity of an Anisotropic Body [in Russian], Nauka, Moscow (1977).
R. Hill, Mathematical Theory of Plasticity [Russian translation], Gostekhizdat, Moscow (1956).