found: Work cat.: Anantha, Madhusudhanan. Gray codes and their applications, 2007:abstract (An n-bit Gray code is an ordered set of all 2n binary strings of length n)
found: McGraw-Hill dictionary of scientific and technical terms, 2003(Gray code: a modified binary code in which sequential numbers are represented by expressions that differ only in one bit, to minimize errors; also known as reflective binary code)
found: Wikipedia, accessed July 19, 2007(Gray code: The reflected binary code, also known as Gray code after Frank Gray, is a binary numeral system where two successive values differ in only one digit)
found: Doran, R.W. The Gray code, 2007(What we now call "Gray code" was invented by Frank Gray; the term "Gray code" is sometimes used to refer to any single-distance code, that is, one in which adjacent code words (perhaps representing integers differing by 1) differ by 1 in one digit position only)
found: Spargo, J.W. A gray code to natural binary decoder, 1983.
