@ARTICLE  {SWu03,
     AUTHOR = {Sleijpen, Gerard L. G. and Wubs, Fred W.},
      TITLE = {Exploiting multilevel preconditioning techniques in
               eigenvalue computations},
  JOURNAL = {SIAM J. Sci. Comput.},
 FJOURNAL = {SIAM Journal on Scientific Computing},
   VOLUME = {25},
     YEAR = {2003},
   NUMBER = {4},
    PAGES = {1249--1272 (electronic)},}