@article {MR2277034,
    AUTHOR = {Kimn, Jung-Han and Sarkis, Marcus},
     TITLE = {Restricted overlapping balancing domain decomposition methods
              and restricted coarse problems for the {H}elmholtz problem},
   JOURNAL = {Comput. Methods Appl. Mech. Engrg.},
  FJOURNAL = {Computer Methods in Applied Mechanics and Engineering},
    VOLUME = {196},
      YEAR = {2007},
    NUMBER = {8},
     PAGES = {1507--1514},
      ISSN = {0045-7825},
     CODEN = {CMMECC},
   MRCLASS = {65N55 (35J05)},
  MRNUMBER = {2277034 (2007k:65211)},
MRREVIEWER = {Mapundi K. Banda},
       DOI = {10.1016/j.cma.2006.03.016},
       URL = {http://dx.doi.org/10.1016/j.cma.2006.03.016},
}