@misc{indiciae572512255309,
  title = {Elliptical flux vortices in YBa2Cu3O7},
  author = {Hickman, H. and Dekker, A. J. and Chen, T. M.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920012389},
  note = {Source identifier: 19920012389}
}