LibEE: a multithreaded dependency graph for character animation. - Martin Watt; Lawrence D. Cutler; Alex Powell; Brendan Duncan; Michael Hutchinson; Kevin Ochs (DigiPro, 2012)

Premo: a natural-interaction animation platform. - Matthew Gong; Fredrik Nilsson; Alex Powell; Jason Reisig; Alex Wells; Stuart Bryson; Esteban Papp; Paul C. DiLorenzo (SIGGRAPH Talks, 2014)

Hierarchy models: building blocks for procedural rigging. - Michael Hutchinson; Sandy Kao; Kevin Ochs; Gilbert Davoud; Alex Powell (SIGGRAPH Talks, 2019)