Condition number estimates for combined potential integral operators in acoustics and their boundary element discretisation Betcke, Timo Chandler-Wilde, Simon N. Graham, Ivan G. Langdon, Stephen Lindner, Marko 2011 - TUHH Open Research
Condition number estimates for combined potential boundary integral operators in acoustic scattering Chandler-Wilde, Simon N. Graham, Ivan G. Langdon, Stephen Lindner, Marko 2009 - TUHH Open Research