@misc{indiciaeb7c5d4ad1c36,
  title = {The discrete complementary variational principle and optimal control systems},
  author = {Chan, W. L. and Leininger, G. G.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740036417},
  note = {Source identifier: 19740036417}
}