Design of a series elastic humanoid for the DARPA Robotics Challenge. - Coleman Knabe; John Seminatore; Jacob Webb; Michael A. Hopkins; Tomonari Furukawa; Alexander Leonessa; Brian Y. Lattimer (Humanoids, 2015)

Team VALOR's ESCHER: A Novel Electromechanical Biped for the DARPA Robotics Challenge. - Coleman Knabe; Robert J. Griffin; James Burton 001; Graham Cantor-Cooke; Lakshitha Dantanarayana; Graham Day; Oliver Ebeling-Koning; Eric Hahn; Michael A. Hopkins; Jordan Neal; Jackson Newton; Chris Nogales; et al. (J. Field Robotics, 2017)