David H. C. Du, Richard C. T. Lee. Symbolic Gray Code as a Multikey Hashing Function. IEEE Trans. Pattern Anal. Mach. Intell., 2(1):83-90, 1980. [doi]
@article{DuL80,
title = {Symbolic Gray Code as a Multikey Hashing Function},
author = {David H. C. Du and Richard C. T. Lee},
year = {1980},
doi = {10.1109/TPAMI.1980.4766976},
url = {http://doi.ieeecomputersociety.org/10.1109/TPAMI.1980.4766976},
researchr = {https://researchr.org/publication/DuL80},
cites = {0},
citedby = {0},
journal = {IEEE Trans. Pattern Anal. Mach. Intell.},
volume = {2},
number = {1},
pages = {83-90},
}