1. Description and theoretical analysis (using schemata) of PLANNER: a language for proving theorems and manipulating models in a robot;Hewitt,1972
2. Actors: A Model of Concurrent Computation in Distributed Systems;Agha,1990
3. A foundation for actor computation;Agha;J. Funct. Program.,1997
4. The structure and semantics of actor languages;Agha,1990