Spacetime constraints revisited. - J. Thomas Ngo; Joe Marks (SIGGRAPH, 1993)

Physically Realistic Motion Synthesis in Animation. - J. Thomas Ngo; Joe Marks (Evol. Comput., 1993)

Optimization - an emerging tool in computer graphics. - Joe Marks; Michael F. Cohen; J. Thomas Ngo; Stuart M. Shieber; John Snyder (SIGGRAPH, 1994)

N-body spacetime constraints. - Diane Tang; J. Thomas Ngo; Joe Marks (Comput. Animat. Virtual Worlds, 1995)

Further Experience with Controller-Based Automatic Motion Synthesis for Articulated Figures. - Joel Auslander; Alex S. Fukunaga; Hadi Partovi; Jon Christensen; Lloyd Hsu; Peter Reiss; Andrew Shuman; Joe Marks; J. Thomas Ngo (ACM Trans. Graph., 1995)

Automatic motion synthesis for 3D mass-spring models. - Jon Christensen; Joe Marks; J. Thomas Ngo (Vis. Comput., 1997)