I Can Help You: Altruistic Behaviors from Children towards a Robot at a Kindergarten. - Yuuki Yasumatsu; Taichi Sono; Komei Hasegawa; Michita Imai (HRI (Companion), 2017)

Help-Estimator: Robot Requests for Help from Humans by Estimating a Person's Subjective Time. - Mitsuhiko Kimoto; Yuuki Yasumatsu; Michita Imai (Int. J. Soc. Robotics, 2022)