@ARTICLE{
author={Potkonjak Veljko,Radojicic J,Tzafestas S},
year={2002},
title={Modeling robot "psycho-physical" state and reactions - A new option in human-robot communication - Part 2: Modeling and simulation},
journal={JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS},
volume={35},
number={4},
pages={353-364},
document_type={Article},
} 

@ARTICLE{
author={Potkonjak Veljko,Radojicic J,Tzafestas S},
year={2002},
title={Modeling robot "psycho-physical" state and reactions - A new option in human-robot communication - Part 1: Concept and background},
journal={JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS},
volume={35},
number={4},
pages={339-352},
document_type={Article},
}