@article {MR2211079,
    AUTHOR = {Ray, Surajit and Lindsay, Bruce G.},
     TITLE = {The topography of multivariate normal mixtures},
   JOURNAL = {Ann. Statist.},
  FJOURNAL = {The Annals of Statistics},
    VOLUME = {33},
      YEAR = {2005},
    NUMBER = {5},
     PAGES = {2042--2065},
      ISSN = {0090-5364},
     CODEN = {ASTSC7},
   MRCLASS = {62E10 (62H05 62H30)},
  MRNUMBER = {MR2211079},
       DOI = {10.1214/009053605000000417},
       URL = {http://dx.doi.org/10.1214/009053605000000417},
}