@INPROCEEDINGS{NavaraQS98A,
  MYNOTE =   { S1998, A1998, P1998 },
  IS =     {zkontrolovano 09 Jan 99},
  AUTHOR =   {Navara, Mirko},
  EDITOR =   {A.~Dvure{\v c}enskij, S.~Pulmannov\'a, F.~Chovanec
                  and E.~Ryb\'arikov\'a},
  TITLE =   {The role of difference operation in quantum
                  structures},
  BOOKTITLE =   {Abstracts of 4th IQSA Biannual Meeting Quantum
                  Structures~'98},
  PUBLISHER =   {Military Academy},
  ADDRESS =   {Liptovsk\'y Mikul\'a{\v s}, Slovakia},
  YEAR =   {1998},
  MONTH =   {September},
  PAGES =   {67},
  ORGANIZATION = {Int. Quantum Structures Association},
  book_pages =   {103},
  venue =   {Liptovsk\'y J\'an, Slovakia},
  psurl =   {[PostScript,
                  26k]},
}