Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Wenhuan Sun and Saul Schaffer and Kevin Dai and Lining Yao and Adam Feinberg and Victoria Webster-Wood,"3D Printing Hydrogel-Based Soft and Biohybrid Actuators: A Mini-Review on Fabrication Techniques, Applications, and Challenges",Frontiers in Robotics and AI,2296-9144,Frontiers Media SA,2021-04-29,8,,673533,https://cir.nii.ac.jp/crid/1360294645222047232,https://doi.org/10.3389/frobt.2021.673533