J. Comp. Acoustics

Treatment of Rank-Deficiency in Acoustics Using SVD (2006)
J. T. Chen, C. T. Chen and I. L. Chen, 2008, Null-field integral equation approach for  eigenproblems  with  circular boundaries, J. Comp. Acoustics., Vol.15, No.4, pp.401-428.(2007) (proof)(final)