Rubens Fernandes Nunes Creto Augusto Vidal Joaquim B. Cavalcante Neto Sensory state machines for physically-based animation. 823-832 2007 23 The Visual Computer 9-11 http://dx.doi.org/10.1007/s00371-007-0161-4 db/journals/vc/vc23.html#NunesVN07