@misc{indiciae3ffed5cd2ba7,
  title = {Trekking poles: Can you save your knees and the environment?},
  author = {J. L. Marion and T. A. Martinez and R. D. Proudman},
  year = {2001},
  url = {https://pubs.usgs.gov/publication/5224188},
  note = {Source identifier: 5224188}
}