@article{wan20224d,
  title={4D printing of multiple shape memory polymer and nanocomposites with biocompatible, programmable and selectively actuated properties},
  author={Wan, Xue and He, Yang and Liu, Yanju and Leng, Jinsong},
  journal={Additive Manufacturing},
  volume={53},
  pages={102689},
  year={2022},
  publisher={Elsevier}
}