B. J. Unger

Comparison of 3-D haptic peg-in-hole tasks in real and virtual environments

Roberta L. Klatzky, Ralph L. Hollis, Peter J. Berkelman, 2001, Proceedings 2001 IEEE/RSJ International Conference on Intelligent Robots and Systems. Expanding the Societal Role of Robotics in the the Next Millennium (Cat. No.01CH37180).

Psychophysics of virtual texture perception

Ralph L. Hollis, Bertram J. Unger, R. Hollis, 2008 .

Roughness Perception in Virtual Textures

Roberta L. Klatzky, Ralph L. Hollis, Bertram J. Unger, 2011, IEEE Transactions on Haptics.

Good vibrations: Asymmetric vibrations for directional haptic cues

Roberta L. Klatzky, Ralph L. Hollis, Hanns Tappeiner, 2009, World Haptics 2009 - Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems.

JND Analysis of Texture Roughness Perception using a Magnetic Levitation Haptic Device

Roberta L. Klatzky, Ralph L. Hollis, Bertram J. Unger, 2007, Second Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (WHC'07).

Haptic Rendering and Psychophysical Evaluation of a Virtual Three-Dimensional Helical Spring

Roberta L. Klatzky, Ralph L. Hollis, Robert H. Swendsen, 2008, 2008 Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems.