A frequency-based and a poisson-based definition of the probability of being informative.

@inproceedings{rolleke-2003-frequencybased, author = {Thomas R\"{o}lleke}, editor = {Charles L. A. Clarke and Gordon V. Cormack and Jamie Callan and David Hawking and Alan F. Smeaton}, title = {{A frequency-based and a poisson-based definition of the probability of being informative}}, booktitle = {{SIGIR 2003: Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, July 28 - August 1, 2003, Toronto, Canada}}, pages = {227--234}, publisher = {ACM}, year = {2003}, url = {https://doi.org/10.1145/860435.860478}, doi = {https://doi.org/10.1145/860435.860478} }