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Journal Article The asymptotic joint distribution of the efficient scores test for the proportional hazards model calculated over time Get access ANASTASIOS A. TSIATIS ANASTASIOS A. TSIATIS Biostatistics Division, St. Jude Children's Research HospitalMemphis, Tennessee Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 68, Issue 1, April 1981, Pages 311–315, https://doi.org/10.1093/biomet/68.1.311 Published: 01 April 1981 Article history Received: 01 March 1980 Revision received: 01 September 1980 Published: 01 April 1981
Anastasios A. Tsiatis (1981) studied this question.