What happens when a robot favors someone?: How a tour guide robot uses gaze behavior to address multiple persons while storytelling about art. - Daphne E. Karreman; Gilberto U. Sepúlveda Bradford; Betsy M. A. G. van Dijk; Manja Lohse; Vanessa Evers (HRI, 2013)

Picking favorites: The influence of robot eye-gaze on interactions with multiple users. - Daphne E. Karreman; Gilberto U. Sepúlveda Bradford; Elisabeth M. A. G. van Dijk; Manja Lohse; Vanessa Evers (IROS, 2013)