1. ADJ: GOGUEN, J.A./THATCHER, J.W./WAGNER, E.G./WRIGHT, J.B. Initial algebra semantics IBM-Report RC 5701, 1975
2. COURCELLE, B. Ensembles Algébriques d'Arbres et Langages Déterministes; quelques applications aux Schémas de Programme IRIA report 1975
3. DAMM, W. Higher type schemes and their tree languages to appear
4. ENGELFRIET, J./SCHMIDT, E.M. IO and OI Datalogisk Afdelning report, DAIMI PB-47, Aarhus University, Denmark, 1975
5. INDERMARK, K. Schemes with recursion on higher types in: Mathematical foundations of Computer Science, Proc. 5th conference in Gdansk, Polen, Lecture Notes in Computer Science, 45, 1976