Searching and Browsing Collections of Structural Information. - Jens E. Wolff; Holger Flörke; Armin B. Cremers (ADL, 2000)

The SearX-Engine at INEX'03: XML enabled probabilistic retrieval. - Holger Flörke (INEX, 2003)

Xaver and the SearX-Engine: XML Retrieval in Real World Applications. - Holger Flörke (TDM, 2004)