@misc {IOPORT.70942704,
    author       = {Karatsu, Yutaka and Nakazawa, Jin and Tokuda, Hideyuki},
    title        = {User grouping method for ad-hoc conversations based on proximity of users and speaking volumes acquired from portable sensors},
    howpublished = {Ubicomp, 577-578 (2011).},
    year         = {2011},
    doi          = {10.1145/2030112.2030221},
    identifier   = {70942704},
}