@misc{indiciae87a11f765243,
  title = {Zero Horizontal Reaction Force Excavator},
  author = {Mueller, Robert P. and Nick, Andrew J. and Schuler, Jason M. and Smith, Jonathan D.},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20150009348},
  note = {Source identifier: 20150009348}
}