@inproceedings{Comarela:2012:UFA:2309996.2310017,
 author = {Comarela, Giovanni and Crovella, Mark and Almeida, Virgilio and Benevenuto, Fabricio},
 title = {Understanding Factors That Affect Response Rates in Twitter},
 booktitle = {Proceedings of the 23rd ACM Conference on Hypertext and Social Media},
 series = {HT '12},
 year = {2012},
 isbn = {978-1-4503-1335-3},
 location = {Milwaukee, Wisconsin, USA},
 pages = {123--132},
 numpages = {10},
 url = {http://doi.acm.org/10.1145/2309996.2310017},
 doi = {10.1145/2309996.2310017},
 acmid = {2310017},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {social networks, timeline, twitter},
}