@inproceedings{learningtorankbyoptimizingndcgmeasure,
  title = {Learning to Rank by Optimizing NDCG Measure},
  author = {Hamed Valizadegan and Rong Jin and Ruofei Zhang and Jianchang Mao},
  year = {2009},
  booktitle = {NeurIPS 2009 12},
  url = {http://papers.nips.cc/paper/3758-learning-to-rank-by-optimizing-ndcg-measure},
}