@misc{indiciae0c61c1028941,
  title = {Certain problems of studying and mastering cosmic space},
  author = {Chernigovskiy, V. N. and Parin, V. V. and Sisakyan, N. M. and Yazdovskiy, V. I.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19640001757},
  note = {Source identifier: 19640001757}
}