@inproceedings{DocEng-2006-TesarSJP,
	author        = "Roman Tesar and Vaclav Strnad and Karel Jezek and Massimo Poesio",
	booktitle     = "{Proceedings of the Sixth Symposium on Document Engineering}",
	doi           = "10.1145/1166160.1166197",
	isbn          = "1-59593-515-0",
	pages         = "138--146",
	publisher     = "{ACM}",
	title         = "{Extending the single words-based document model: a comparison of bigrams and 2-itemsets}",
	year          = 2006,
}