@article{ackley2013cacmtoappear,
 author = {Ackley, David H.},
 title = {Beyond Efficiency},
 journal = {Commun. ACM},
 issue_date = {October 2013},
 volume = {56},
 number = {10},
 month = oct,
 year = {2013},
 issn = {0001-0782},
 publisher = {ACM},
 address = {New York, NY, USA},
 note = "To appear; author preprint: \url{http://nm8.us/1}"
}