1. Infinite Trees and Completely Iterative Theories: A Coalgebraic View;Aczel;Theoret. Comput. Science,2003
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3. Free Iterative Theories — A Coalgebraic View;Adámek;Math. Structures Comput. Sci.,2003
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5. J. Adámek, S. Milius and J. Velebil, From Iterative Algebras to Iterative Theories (Extended Abstract), accepted for publication in Electron. Notes Theor. Comput. Sci., full version available via http://www.iti.cs.tu-bs.de/~milius