@article{mulakkal2018responsive,
  title={Responsive cellulose-hydrogel composite ink for 4D printing},
  author={Mulakkal, Manu C and Trask, Richard S and Ting, Valeska P and Seddon, Annela M},
  journal={Materials \& Design},
  volume={160},
  pages={108--118},
  year={2018},
  publisher={Elsevier}
}