A class of rank estimators is introduced for regression analysis in the presence of both left-truncation and right-censoring on the response variable. By making use of martingale theory and a tightness lemma for stochastic integrals of multiparameter empirical processes, the asymptotic normality of the estimators is established under certain assumptions. Adaptive choice of the score functions to give asymptotically efficient rank estimators is also discussed.
"Rank Regression Methods for Left-Truncated and Right-Censored Data." Ann. Statist. 19 (2) 531 - 556, June, 1991. https://doi.org/10.1214/aos/1176348110