@misc{indiciaeac31d2996795,
  title = {Computation of optimal singular controls},
  author = {Gershwin, S. B. and Jacobson, D. H. and Lele, M. M.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700052950},
  note = {Source identifier: 19700052950}
}