Andrew M. Odlyzko, W. D. Smith. Nonabelian sets with distinct k-sums. Discrete Mathematics, 146(1-3):169-177, 1995. [doi]
@article{OdlyzkoS95,
title = {Nonabelian sets with distinct k-sums},
author = {Andrew M. Odlyzko and W. D. Smith},
year = {1995},
doi = {10.1016/0012-365X(94)00162-7},
url = {http://dx.doi.org/10.1016/0012-365X(94)00162-7},
researchr = {https://researchr.org/publication/OdlyzkoS95},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {146},
number = {1-3},
pages = {169-177},
}