2010 · Akiyoshi Suzuki, Mayu Iwata, et al. · ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (SIGSPATIAL GIS) · 58
2013 · Matthew Ekstrand-Abueg, Virgil Pavlu, et al. · International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR) · 7