1. The TTL Data Book for Design Engineers, Texas Instruments (1973)
2. Lucal, H. M., ‘Arithmetic Operations for Digital Computers Using a Modified Reflected Binary Code’, IEEE Trans. C., EC 8, 449–458 (1959)
3. Oberman, R. M. M., ‘A New Explanation of the Reflected Binary Code’, IEEE Trans. Comp., C-23, 641–642 (1974)
4. Agrawal, D. P., ‘Arithmetic Algorisms in a Negative Base’, IEEE Trans. Comp. C-24,998–1000(1975)
5. Advanced Micro Devices, Catalog (1972)