@article{JahnkeHamson1999,
  author    = {Jahnke, Thomas and Hamson, Mike},
  title     = {Measuring cycling effort},
  year      = {1999},
  language  = {en}
}
@article{JahnkeHamson1999,
  author    = {Jahnke, Thomas and Hamson, Mike},
  title     = {Gearing up for mountain biking},
  year      = {1999},
  language  = {en}
}