1. Efficient substructure discovery from large semi-structured data;Asai,2002
2. Treefinder: a first step towards XML data mining;Termier,2002
3. Efficient discovery of frequent unordered trees;Nijssen,2003
4. Discovering frequent substructures in large unordered trees;Asai,2003
5. Efficient data mining for maximal frequent subtrees;Xiao,2003