@ARTICLE{PtakNearlyBoolean,
  MYNOTE =   { A1997, P1998 },
  IS =     {zkontrolovano 09 Jan 99},
  AUTHOR =   {Pt{\'a}k, P.},
  TITLE =   {Some nearly {B}oolean orthomodular posets},
  JOURNAL =   {Proc. Amer. Math. Soc.},
  issn =   {0002-9939},
  publisher =   {American Mathematical Society},
  address =   {Providence, USA},
  YEAR =   {1998},
  VOLUME =   {126},
  NUMBER =   {7},
  PAGES =   {2039--2046},
  WHO =     {Navara},
}