A 3D-Printed Self-Learning Three-Linked-Sphere Robot for Autonomous Confined-Space Navigation. - Brian Elder; Zonghao Zou; Samannoy Ghosh; Oliver Silverberg; Taylor E. Greenwood; Ebru Demir; Vivian Song-En Su; On Shun Pak; Yong Lin Kong (Adv. Intell. Syst., 2021)