ACM - affordances
Shengdong Zhao
Rubaiat Habib Kazi
Kien Chuan Chua
Richard Davis
Kok-Lim Low
Experimental analysis of mode switching techniques in pen-based user interfaces
Modeling soil
Massachusetts Institute of Technology
A Partial History, 2009
The Practiced Digital Hand, MIT Press, Cambridge, MA, 1998
Detail-preserving paint modeling for 3D brushes