@Article{SMITH_JRSJ06,
  author = 	 {Noriaki Mitsunaga and Christian Smith and Takayuki Kanda and Hiroshi Ishiguro and Norihiro Hagita},
  title = 	 {Robot Behavior Adaptation for Human-Robot Interaction based on Policy Gradient Reinforcement Learning},
  journal = 	 {Journal of the Robotics Society of Japan},
  year = 	 {2006},
  volume = 	 {24},
  number = 	 {7},
  pages = 	 {820--829},
  month = 	 {oct},
}