Building a 6-axis DOF robot arm for Lego World 2017, by Sioux.NET on Track - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Mindstorms H25 robot arm build with 31313 parts (consumer set) – blog.digidigital.de
Robot Arm H25 — ev3-micropython 2.0.0 documentation
LEGO MOC Lego Mindstorms 6-axis-Robotic arm with 31313, 45544, 42056 & 42055 by KatzMikeHD | Rebrickable - Build with LEGO