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Sankaran, P. G.; Sreeja, V. N. . (2007).
Proportional Hazards Model for Multivariate Failure Time Data. Communications in Statistics - Theory and Methods, 36(8), 1627–1641.
doi:10.1080/03610920601125888
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research
