A novel mechanism for varying stiffness via changing transmission angle. - Hung Quy Vu; Lijin Aryananda; Farrukh Iqbal Sheikh; Flurin Casanova; Rolf Pfeifer (ICRA, 2011)

Knee stiffness adjustment for energy efficient locomotion of a legged robot on surfaces with different stiffness. - Hung Quy Vu; Lorenzo G. Marcantini (ROBIO, 2013)

Determinants for Stiffness Adjustment Mechanisms. - Amir Jafari; Hung Quy Vu; Fumiya Iida (J. Intell. Robotic Syst., 2016)