@misc{indiciaee947a34e619f,
  title = {New Methods for Improved Double Circular-Arc Helical Gears},
  author = {Litvin, Faydor L. and Lu, Jian},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/19970025519},
  note = {Source identifier: 19970025519}
}