Jeffrey Schoner Jochen Lang Hans-Peter Seidel Measurement-Based Interactive Simulation of Viscoelastic Solids. 547-556 2004 23 Comput. Graph. Forum 3 http://diglib.eg.org/EG/CGF/volume23/issue3/v23i3pp547-556_abstract.html db/journals/cgf/cgf23.html#SchonerLS04