@InProceedings{Navara:W07,
  IS = { zkontrolovano 15 Dec 2007 },
  UPDATE  = { 2007-12-11 },
  author =      {Mirko Navara},
  title =       {Constructions of stateless quantum structures},
  year =        {2007},
  pages =       {2--3},
  booktitle =   {Abstracts of Workshop on Quantum Structures},
  editor =      {O.~N{\'a}n{\'a}{\v s}iov{\'a}},
  publisher =   {Slovak Technical University},
  address =     {Bratislava, Slovakia},
  isbn =        {none},
  book_pages =  {7},
  month =       {November},
  day =         {22-25},
  venue =       {Bratislava, Slovakia},
  organization ={Slovak Technical University},
  annote = {We clarify the limits of constructions of quantum
    structures without states.},
  keywords =    {orthomodular lattice, orthomodular poset, 
    effect algebra, state, probability measure},
  importance =  {0},
  project =     {GACR 201/07/1051},
}