1. Mentor Graphics Corporation, Mentor Graphics Idea Station.
2. SDA Systems Inc., SDA Systems Reference Manuals, 1988.
3. Silva Met al. Protection and versioning for OCT. Proceedings of Design Automation Conference, 1989, 264–269.
4. Rubin S M. ELECTRIC Tutorial and User Guide. Slumberger Palo Alto Research Center, 3340 Hillview Avenue, Palo Alto, California 94304, June 1988.
5. Nagel L W. SPICE2: a computer program to simulate semiconductor circuits. Tech. Rep. ERL-M520, Electronics Research Lab., Univ. of Cali. at Berkeley, May 1975.