@article{HuFengZhangetal.2020,
  author    = {Qingxi Hu and Di Feng and Haiguang Zhang and Yuan Yao and Mohamed Aburaia and Herfried Lammer},
  title     = {Oriented to Multi-Branched Structure Unsupported 3D Printing Method Research},
  journal   = {Materials, vol. 13, no. 9, p. 2023, Apr. 2020},
  year      = {2020},
}