Exact Learning of Tree Patterns from Queries and Counterexamples. - Thomas R. Amoth; Paul Cull; Prasad Tadepalli (COLT, 1998)

Exact Learning of Unordered Tree Patterns from Queries. - Thomas R. Amoth; Paul Cull; Prasad Tadepalli (COLT, 1999)

On Exact Learning of Unordered Tree Patterns. - Thomas R. Amoth; Paul Cull; Prasad Tadepalli (Mach. Learn., 2001)