@misc{indiciaee76a7b9e6aa4,
  title = {4U 1626-67 - The binary with the smallest known mass function},
  author = {Levine, A. and Ma, C. P. and Rappaport, S. and Mcclintock, J. and Van Der Klis, M.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19880043916},
  note = {Source identifier: 19880043916}
}