Beyond Flickr: Not All Image Tagging Is Created Equal. - Judith L. Klavans; Raul Guerra; Rebecca LaPlante; Ed Bachta; Robert Stein (Language-Action Tools for Cognitive Artificial Agents, 2011)

Fast Large-Scale Approximate Graph Construction for NLP. - Amit Goyal 001; Hal Daumé III; Raul Guerra (EMNLP-CoNLL, 2012)