Spruance,S.L. Hazard ratio in clinical trials(PDF). Antimicrobial Agents and Chemotherapy. 2004, 48 (8): pp. 2787–2792 [2013-08-09]. (原始内容存档(PDF)于2018-08-03). 引文格式1维护:冗余文本 (link) (页面存档备份,存于互联网档案馆)
Cox, D. R. Regression-Models and Life-Tables(PDF). Journal of the Royal Statistical Society. B (Methodological). 1972, 34 (2): 187–220 [5 December 2012]. (原始内容(PDF)存档于2013-06-20). (页面存档备份,存于互联网档案馆)
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Spruance,S.L. Hazard ratio in clinical trials(PDF). Antimicrobial Agents and Chemotherapy. 2004, 48 (8): pp. 2787–2792 [2013-08-09]. (原始内容存档(PDF)于2018-08-03). 引文格式1维护:冗余文本 (link) (页面存档备份,存于互联网档案馆)
Cox, D. R. Regression-Models and Life-Tables(PDF). Journal of the Royal Statistical Society. B (Methodological). 1972, 34 (2): 187–220 [5 December 2012]. (原始内容(PDF)存档于2013-06-20). (页面存档备份,存于互联网档案馆)