R. F. DeMara and D. I. Moldovan, "Performance Indices for Parallel Marker-
Propagation," in Proceedings of the 1991 International Conference on Parallel 
Processing (ICPP-91), pp. 658 - 659, St. Charles, Illinois, U.S.A., August 12 - 
16, 1991.

Abstract:
The authors have been experimenting with knowledge representation and reasoning 
mechanisms suitable for parallel computation. Their primary domain is natural 
language understanding (NLU) using a semantic network representation and 
parallel marker-passing techniques. They have implemented a multiprocessor 
called the Semantic Network Array Processor (SNAP-1) for real-time processing of 
moderately-sized knowledge bases