@TECHREPORT{DeSimoneNavara:TR02,
  IS = { zkontrolovano 06 Jan 2003 },
  UPDATE  = { 2002-12-13 },
       AUTHOR = {De~Simone, Anna and Navara, Mirko},
        TITLE = {On the permanence properties of interval 
                 homogeneous orthomodular lattices},
  authorship =  {50-50},
  INSTITUTION = {Universit{\`a} degli studi di Napoli ``Federico~II''},
         TYPE = {Technical Report},
      ADDRESS = {Napoli, Italy},
         YEAR = {2002},
        MONTH = {October},
       NUMBER = {54},
  pages =       {9},
  importance =  {0},
  project =     {MSM 212300013, GACR 201/00/0331},
  psurl       = {[PostScript]},
}