@incollection {MR1966876,
    AUTHOR = {Sarkis, Marcus},
     TITLE = {A coarse space for elasticity: partition of unity rigid body
              motions coarse space},
 BOOKTITLE = {Applied mathematics and scientific computing ({D}ubrovnik,
              2001)},
     PAGES = {261--273},
 PUBLISHER = {Kluwer/Plenum, New York},
      YEAR = {2003},
   MRCLASS = {74S05 (65N30 65N55 74G15)},
  MRNUMBER = {1966876 (2004b:74090)},
}