Design, development, and validation of a non-backdrivable active ankle-foot orthosis for the TWIN lower-limb exoskeleton. - Raffaele Giannattasio; Nicoló Boccardo; Riccardo Vaccaro; Heeral Bhatt; Stefano Maludrottu; Elena De Momi; Matteo Laffranchi (Frontiers Robotics AI, 2025)