@inbook{9fec2e65308242ac9fd42b4dbf7d9762,
title = "Human Smile Distinguishes between Collaborative and Solitary Tasks in Human-Robot Interaction",
keywords = "Collaboration, Smiling, Social Signals",
author = "Franziska Kirstein and Kerstin Fischer and {\"O}zg{\"u}r Erkent and Justus Piater",
year = "2015",
doi = "10.1145/2701973.2702038",
language = "English",
pages = "145--146",
booktitle = "HRI'15 Extended Abstracts",
publisher = "Association for Computing Machinery",
address = "United States",
note = "human-robot interaction conference ; Conference date: 02-03-2015",
}