@misc{indiciaef28be6d34d8e,
  title = {Application of several variable-valve-timing concepts to an LHR engine},
  author = {Morel, T. and Keribar, R. and Sawlivala, M. and Hakim, N.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880027892},
  note = {Source identifier: 19880027892}
}