+In PAN 2013 competition on plagiarism detection we participated in both the Source Retrieval
+and the Text Alignment subtask. In both tasks we adapted methodology used in PAN 2012.
+Section~\ref{source_retr} describes querying approach for source retrieval, where we used three different
+types of queries. We present a new type of query based on text paragraphs.
+The query execution were controled by its type and by preliminary similarities
+discovered during the searches.
+In section~\ref{text_alignment} we present modified common text feature fot text alignment.
+We also compare performance of both the previous and the modified algorithms.