@article{cnc09,
   author = {P. Grudzinski and M. Wojciechowski},
   title = {Integration of Candidate Hash Trees in Concurrent Processing of Frequent Itemset Queries Using Apriori},
   journal = {Control and Cybernetics},
   publisher = {Instytut Badań Systemowych PAN},
   issn = "0324-8569"
   year = 2009,
   volume = 38,
   number = 1,
   pages = "47--65",
}