@misc{indiciae61420ce33585,
  title = {The Differential Algebra Based Multiple Level Fast Multipole Algorithm for 3D Space Charge Field Calculation and Photoemission Simulation},
  author = {Zhang, He and Portman, Jenni and Tao, Zhensheng and Duxbury, Phillip and Ruan, Chong-Yu and Makino, Kyoko and Berz, Martin},
  year = {2015},
  doi = {10.1017/s1431927615013410},
  url = {https://www.osti.gov/biblio/1233556},
  note = {Source identifier: 1233556}
}