@online{olson2025,
  author = {Olson, Dieter},
  title = {Natural Vs {Active} {Forces} and {Torques} in {Affine}
    {Mechanical} {Systems}},
  date = {2025-11-28},
  url = {https://affinedrift.com/articles/drift-components-wrench-double-pendulum.html},
  langid = {en}
}