1. Class hierarchy specialization

   • Frank Tip
   • Peter F. Sweeney

   Original article Pages: 927 - 982

2. Special factors, periodicity, and an application to Sturmian words

   • Arturo Carpi
   • Aldo de Luca

   Original article Pages: 983 - 1006

3. Type introduction for equational rewriting

   • Aart Middeldorp
   • Hitoshi Ohsaki

   Original article Pages: 1007 - 1029

4. Acknowledgement to Referees

   Acknowledgement to Referees Pages: 1031 - 1032