• Brock, D.L., Woojin, L., Segalman, D.J., and Witkowski, W.,
  ``A Dyanmic Model of a Linear Actuator based on Polymer Hydrogel,''
  Journal of Intelligent Materials and Structures, in Press 1994.

• Brock, D.L.,
  ``Dynamic Model and Control of an Artificial Muscle Based on Contractile Polymers,''
  MIT AI Memo No. 1331, November 1991.

• Brock, D.L.,
  ``Review of Artificial Muscle Based on Contractile Polymers,''
  MIT AI Memo No. 1330, November 1991.

• Lee, Woojin,
  "Polymer Gel Based Actuator: Dynamic model of gel for real-time control,"
  MIT Ph.D. Thesis, May 1996.