Zhang H M, Wang C R, Zhu Y C. Stability of solutions to Hilbert boundary value problem under perturbation of the boundary curve[J]. J Math Anal Appl,2003,284(2):601-617.
Wang C R, Zhang H M, Zhu Y C. The Riemann boundary value problem with respect the perturbation of boundary curve[J]. Complex Variables Elliptic Eqns,2006,51(8):631-845.
[5]
Lin J, Wang C R. Riemann boundary value problem with respect to the perturbation of boundary curve to be an open arc[J]. Acta Math Scientia,2009,B29:1481-1488.