@inproceedings{inversedocumentdensityasmoothmeasurefor,
  title = {Inverse Document Density: A Smooth Measure for Location-Dependent Term Irregularities},
  author = {Dennis Thom and Harald Bosch and Thomas Ertl},
  year = {2012},
  booktitle = {COLING 2012 12},
  url = {https://aclanthology.org/C12-1159},
}