@INPROCEEDINGS{PtakQS98A,
  IS =     { zkontrolovano 07 Jan 00 },
  AUTHOR =   {Pt{\'a}k, P.},
  EDITOR =   {A. Dvure{\v c}enskij, F. Chovanec, S. Pulmannov\'a
                  and E. Ryb\'arikov\'a},
  TITLE =   {Concrete logics},
  BOOKTITLE =   {Abstracts Quantum Structures '98},
  PUBLISHER =   {Military Academy},
  isbn =   {none},
  book_pages =   {103},
  ADDRESS =   {Liptovsk\'y Mikul\'a\v s, Slovakia},
  venue =   {Liptovsk\'y Mikul\'a\v s, Slovakia},
  YEAR =   {1998},
  MONTH =   {August},
  PAGES =   {71},
  WHO =     {Navara},
}