1. Probabilistic logics;von Neumann,1956
2. Several-valued combinational switching circuits;Lee;Trans. AIEE,1956
3. Non-binary switching theory;Lowenschuss;IRE Convention Record,1958
4. Reliable circuits using less reliable relays;Moore;J. Franklin Inst.,1956
5. Reliable circuits using less reliable relays;Moore;J. Franklin Inst.,1956