37. Reference
● Learning to Rank for Information Retrieval
– research.microsoft.com/en-
us/people/tyliu/learning_to_rank_tutorial_-_www_-_2008.pdf
● ランキング学習ことはじめ
– www.slideshare.net/sleepy_yoshi/dsirnlp1
● Large Scale Learning to Rank
– http://research.google.com/pubs/archive/35662.pdf