In the folder I would add the Bibtex information
@article{kanungo2002,
title={An efficient k-means clustering algorithm: Analysis and implementation},
author={Kanungo, Tapas and Mount, David M and Netanyahu, Nathan S and Piatko, Christine D and Silverman, Ruth and Wu, Angela Y},
journal={IEEE transactions on pattern analysis and machine intelligence},
volume={24},
number={7},
pages={881--892},
year={2002},
publisher={IEEE},
pdf = {kanungo2002.pdf},
url = {http://ieeexplore.ieee.org/abstract/document/1017616/},
annote = {This is an old document, but it has a very nice write up and has been cited many times. The empirical section has good results and it would be very interesting to attempt to reproduce.}
}