A strategy for detecting faults in sequential machines not possessing distinguishing sequences. - D. E. Farmer (AFIPS Fall Joint Computing Conference, 1970)

Algorithms for Designing Fault-Detection Experiments ror Sequential Machines. - Daniel E. Farmer (IEEE Trans. Computers, 1973)

An Algebraic Method for Designing Multivalued Logic Circuits using Principally Binary Components. - J. E. Birk; D. E. Farmer (IEEE Trans. Computers, 1975)

Fault-Detection Experiments for Parallel-Decomposable Sequential Machines. - P. Das; D. E. Farmer (IEEE Trans. Computers, 1975)