@ARTICLE{Wang+LingETAL-EffeCondNumbBoun:09,
  author       = {Wang, F. Z. and Ling, L. and Chen, W.},
  title        = {Effective condition number for boundary knot method},
  journal      = {Comput. Materials  Continua},
  fjournal     = {{CMC}-Computers Materials \& Continua},
  volume       = {12},
  number       = {1},
  pages        = {57-70},
  year         = {2009},
}