@misc{indiciae1c19e8aa2627,
  title = {Helical gears with circular arc teeth: Generation, geometry, precision and adjustment to errors, computer aided simulation of conditions of meshing and bearing contact},
  author = {Litvin, Faydor L. and Tsay, Chung-Biau},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870020413},
  note = {Source identifier: 19870020413}
}