@inproceedings {4125,
	title = {Hybrid Index Maintenance for Growing Text Collections},
	booktitle = {International Conference on Research and Development in Information Retrieval (SIGIR)},
	year = {2006},
	doi = {10.1145/1148170.1148233},
	author = {Stefan B{\"u}ttcher and Charles Clarke and Brad Lushman}
}
