@inproceedings{martin15,
 author = {William Martin and Mark Harman and Yue Jia and Federica Sarro and Yuanyuan Zhang},
 title = {The App Sampling Problem for App Store Mining},
 booktitle = {Proceedings of the 12th IEEE Working Conference on Mining Software Repositories ({MSR'15})},
 year = {2015},
 isbn = {978-0-7695-5594-2},
% url = {http://dx.doi.org/10.1109/MSR.2015.19},
% doi = {10.1109/MSR.2015.19},
 location = {Florence, Italy},
 pages = {123-133},
 publisher = {IEEE}
}