@article{econhot_econhot-cited-9aad7990370d5c59,
  title = {Proportional hazards tests and diagnostics based on weighted residuals},
  author = {Patricia M. Grambsch and Terry M. Therneau},
  journal = {Biometrika},
  year = {1994},
  volume = {81},
  number = {3},
  pages = {515-526},
  doi = {10.1093/biomet/81.3.515},
  url = {https://doi.org/10.1093/biomet/81.3.515}
}