Search Engine

Lucene Search Engine: An Overview
https://drtc.isibang.ac.in/bitstream/handle/1849/244/I_lucene+search.pdf;jsessionid=5EA7E05080E43902AE52E4147CBB9786?sequence=1

Lucene Algorithm Paper
http://www.scribd.com/doc/18004805/Lucene-Algorithm-Paper

Moving Lucene a step forward
http://www.jroller.com/melix/entry/why_lucene_isn_t_that

Lucene Tutorial
http://www.darksleep.com/lucene/

simple example how to use Lucene for indexing and searching
http://hudson.zones.apache.org/hudson/job/Lucene-trunk/javadoc//demo/index.html