@misc{indiciaef4a15431827d,
  title = {Superconducting phonon spectroscopy using a low-temperature scanning tunneling microscope},
  author = {Leduc, H. G. and Kaiser, W. J. and Hunt, B. D. and Bell, L. D. and Jaklevic, R. C.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890043866},
  note = {Source identifier: 19890043866}
}