@INPROCEEDINGS
        { FNUcpm02.1,
          TITLE = "Optimal Exact and Fast Approximate Two Dimensional Pattern 
		   Matching Allowing Rotations",
          AUTHOR = "K. Fredriksson and G. Navarro and E. Ukkonen",
          BOOKTITLE = {Proc. 13th Annual Symposium on Combinatorial Pattern Matching (CPM)},
          SERIES = "LNCS 2373",
          YEAR = 2002,
	  PAGES = "235--248"
        }