@misc{indiciaeee6cac3d3de9,
  title = {Crowned spur gears - Methods for generation and tooth contact analysis. I - Basic concepts, generation of the pinion tooth surface by a plane},
  author = {Litvin, F. L. and Handschuh, R. F. and Zhang, J.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890041935},
  note = {Source identifier: 19890041935}
}