Proceedings of the IIR 2015 workshop can be found here. Please, use the bibtex code below to cite IIR 2015 papers.
@inproceedings{LABEL,
author = {AUTHORS},
title = {TITLE},
booktitle = {Proc. 6th Italian Information Retrieval Workshop (IIR) 2015},
location = {Cagliari, Italy},
year = {2015},
numpages = {NUM_PAGES},
publisher = {CEUR Workshop Proceedings},
howpublished = “\url{http://ceur-ws.org/Vol-
ISSN = {163-0073},
}