@misc{Piernik_Maciej_Partial,
 author={Piernik, Maciej and Morzy, Tadeusz},
 copyright={Piernik, Maciej},
 copyright={Morzy, Tadeusz},
 howpublished={online},
 language={eng},
 type={raport z badań},
 title={Partial tree-edit distance: a solution to the default class problem in pattern-based tree classification.},
 keywords={tree-subtree similarity, tree clasification},
}