Masumi Shirakawa, Takahiro Hara, Shojiro Nishio. IDF for Word N-grams. ACM Trans. Inf. Syst., 36(1), 2017. [doi]
@article{ShirakawaHN17, title = {IDF for Word N-grams}, author = {Masumi Shirakawa and Takahiro Hara and Shojiro Nishio}, year = {2017}, doi = {10.1145/3052775}, url = {http://doi.acm.org/10.1145/3052775}, researchr = {https://researchr.org/publication/ShirakawaHN17}, cites = {0}, citedby = {0}, journal = {ACM Trans. Inf. Syst.}, volume = {36}, number = {1}, }