PIC matrices: a computationally tractable class of probabilistic query operators
A theory of term weighting based on exploratory data analysis
ACM Transactions on Information Systems
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR ’98
Howard Turtle
W. Bruce Croft
Very sparse stable random projections for dimension reduction in l? (0 <? ? 2) norm