Ronald L. Graham, Andrew Chi-Chih Yao, F. Frances Yao. Addition chains with multiplicative cost. Discrete Mathematics, 23(2):115-119, 1978. [doi]
@article{GrahamYY78,
title = {Addition chains with multiplicative cost},
author = {Ronald L. Graham and Andrew Chi-Chih Yao and F. Frances Yao},
year = {1978},
doi = {10.1016/0012-365X(78)90111-5},
url = {http://dx.doi.org/10.1016/0012-365X(78)90111-5},
researchr = {https://researchr.org/publication/GrahamYY78},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {23},
number = {2},
pages = {115-119},
}