On the structure of programming languages, or, six languages for turing machinesEric G. Wagner1967SWAT 1967
Parallel program schemata: A mathematical model for parallel computationRichard M. KarpRaymond E. Miller1967SWAT 1967
Turing machines with several read-write heads preliminary reportAlbert R. MeyerArnold L. Rosenberget al.1967SWAT 1967