@InProceedings{1,
author = {P. R. Pagilla, M. Tomizuka},
title = {Adaptive control of two robot arms carrying an unknown object},
booktitle ={in proceedings of IEEE conf. on robotics and automation},
pages = {597-602},
year = {1995}
}

@InProceedings{2,
author = {P. R. Pagilla, M. Tomizuka},
title = {Hybrid Force/Motion Control of Two Arms Carrying an Object},
booktitle = {in proceedings of  IEEE American control conference},
pages = {195-199},
year = {1994},
month = {June}
}

@InProceedings{3,
author = {D. Lee and others },
title = {Bilateral Teleoperation of Multiple Cooperative Robots over Delayed Communication Networks: Application},
booktitle ={in proceedings of  IEEE International Conference on Robotics and Automation},
pages = {366-371},
year = {2005},
month = {Aprill},
publisher = {IEEE}
}