@article{HeinEubanksLingametal.2021,
  author    = {Andreas M. Hein and T. Marshall Eubanks and Manasvi Lingam and Adam Hibberd and Dan Fries and Jean Schneider and Pierre Kervella and Robert Kennedy and Nikolaos Perakis and Bernd Dachwald},
  title     = {Interstellar now! Missions to explore nearby interstellar objects},
  journal   = {Advances in Space Research},
  volume    = {69},
  number    = {1},
  pages     = {402 -- 414},
  doi       = {10.1016/j.asr.2021.06.052},
  year      = {2021},
}