Hewitt, Carl; Baker, Henry (August 1–5, 1977), "Actors and Continuous Functionals", Proceeding of IFIP Working Conference on Formal Description of Programming Concepts
Hewitt, Carl; Baker, Henry G. (1977), "Laws for Communicating Parallel Processes", IFIP Congress: 987–92
Baker, Henry (January 1978), Actor Systems for Real-Time Computation (EECS Doctoral Dissertation), Cambridge: Massachusetts Institute of Technology