Petter Bivall Persson Matthew D. Cooper Lena A. E. Tibell Shaaron Ainsworth Anders Ynnerman Bengt-Harald Jonsson Designing and Evaluating a Haptic System for Biomolecular Education. 171-178 2007 VR http://doi.ieeecomputersociety.org/10.1109/VR.2007.352478 conf/vr/2007 db/conf/vr/vr2007.html#PerssonCTAYJ07