@article {MR1469678,
    AUTHOR = {Sarkis, Marcus},
     TITLE = {Nonstandard coarse spaces and {S}chwarz methods for elliptic
              problems with discontinuous coefficients using non-conforming
              elements},
   JOURNAL = {Numer. Math.},
  FJOURNAL = {Numerische Mathematik},
    VOLUME = {77},
      YEAR = {1997},
    NUMBER = {3},
     PAGES = {383--406},
      ISSN = {0029-599X},
     CODEN = {NUMMA7},
   MRCLASS = {65N30 (65N55)},
  MRNUMBER = {1469678 (98m:65199)},
MRREVIEWER = {J{\'a}n Lovi{\v{s}}ek},
       DOI = {10.1007/s002110050292},
       URL = {http://dx.doi.org/10.1007/s002110050292},
}