@misc{indiciae39a22ab7323a,
  title = {A multilevel control system for the large space telescope},
  author = {D D Siljak and S K Sundareshan and M B Vukcevic},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750023375},
  note = {Source identifier: 19750023375}
}