1. On the one approximate method for solving boundary problems;Kupradze;Bull. Georgia Acad. Sci.,1963
2. The method of functional equations for approximate solution of some boundary problems;Kupradze;Zh. Vychisl. Mat. Mat. Fiz.,1964
3. On the completeness of the system of metaharmonic functions;Vekua;Dokl. Akad. Nauk SSSR,1953
4. On the metaharmonic functions;Vekua;Proc. Tbilisi Math. Inst. Acad. Sci. Georgia,1943