Tikhonov type regularization method for the Cauchy problem of the modified Helmholtz equation. - H. H. Qin; D. W. Wen (Appl. Math. Comput., 2008)

A quasi-reversibility regularization method for the Cauchy problem of the Helmholtz equation. - H. W. Zhang; H. H. Qin; T. Wei (Int. J. Comput. Math., 2011)