@InProceedings{wtb2013a,
author={T. Wagner and H. Trautmann and D. Brockhoff},
title={{Preference Articulation by Means of the R2 Indicator}},
booktitle={Conference on Evolutionary Multi-Criterion Optimization (EMO 2013)},
year={2013},
pages={81--95},
series={Lecture Notes in Computer Science},
volume={7811}
}