00420nam a2200133Ia 4500020001500000082001900015100004300034245007100077260003400148300002300182490005100205500000500256700002500261  a3540520007  a510.3bEn56.29  aEncyclopaedia of Mathematical Sciences  aGeometry IIbspaces of constant curvaturecEdited by E. B. Vinberg  aBerlinbSpringer-Verlagc1993  a254p. Bibl. Index.  aEncyclopaedia of Mathematical Sciencesv V. 29  a  aVinberg, E. B. ; ed.