@online{olson2026,
  author = {Olson, Dieter},
  title = {Impact {Mechanics} and {Ball} {Flight:} {A} {Reference}
    {Treatment}},
  date = {2026-08-03},
  url = {https://affinedrift.com/articles/impact-mechanics-and-ball-flight.html},
  langid = {en}
}