Pamela Samuelson. Too many copyrights?. Communications of the ACM, 54(7):29-31, 2011. [doi]
@article{Samuelson11a,
title = {Too many copyrights?},
author = {Pamela Samuelson},
year = {2011},
doi = {10.1145/1965724.1965736},
url = {http://doi.acm.org/10.1145/1965724.1965736},
researchr = {https://researchr.org/publication/Samuelson11a},
cites = {0},
citedby = {0},
journal = {Communications of the ACM},
volume = {54},
number = {7},
pages = {29-31},
}