SDISCOVER
--> This paper describes tools and algorithms to discover motifs in protein families and to classify proteins in the PROSITE groups (the paper appeared in Nucleic Acids Research, Vol. 22, No. 14, 1994, pp. 2769-2775).

TMATCH-SYSTEM
--> This paper describes a system for approximate tree matching (the paper appeared in IEEE Transactions on Knowledge and Data Engineering, Vol. 6, No. 4, August 1994, pp. 559-571).

TMATCH-VLDC
--> This paper describes algorithms for approximate tree matching with variable length don't cares (the paper appeared in Journal of Algorithms, Vol. 16, No. 1, January 1994, pp. 33-66).

TDISCOVER
--> This paper describes an algorithm for finding the largest approximately common substructures of two trees (the paper appeared in IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 20, No. 8, August 1998, pp. 889-895).