@ARTICLE{NavaraPAMS94,
  IS = { zkontrolovano 23 Jan 2009 },
  UPDATE  = { 2009-01-23 },
  AUTHOR =   {Navara, Mirko},
  TITLE =   {An orthomodular lattice admitting no group-valued measure},
  JOURNAL =   {Proceedings of the American Mathematical Society},
  ISSN = {0002-9939},
  psurl =   {{ [PostScript]}},
  YEAR =   {1994},
  VOLUME =   {122},
  PAGES =   {7--12},
}