1. G. V. Kuz’mina, “Methods of geometric function theory. I, II,” Algebra Analiz, 9, No.3, 41–103 (1997); No. 5, 1–50 (1997).
2. V. N. Dubinin, “Separating transformation of domains and problems on extremal decomposition,” Zap. Nauchn. Semin. POMI, 168, 48–66 (1988).
3. V. N. Dubinin, “Symmetrization in the geometric theory of functions of a complex variable,” Usp. Mat. Nauk, 49, No.1, 3–76 (1994).
4. E. G. Emel’yanov, “A connection between two problems on extremal decomposition,” Zap. Nauchn. Semin. POMI, 160, 91–98 (1987).
5. G. V. Kuz’mina, “Connections among different problems on extremal decomposition,” Zap. Nauchn. Semin. POMI, 254, 116–131 (1998).