Parner, E T, Andersen, P K & Overgaard, M 2023, ' Regression models for censored time-to-event data using infinitesimal jack-knife pseudo-observations, with applications to left-truncation ', Lifetime Data Analysis, vol. 29, no. 3, pp. 654-671 . https://doi.org/10.1007/s10985-023-09597-5 Parner, E T, Andersen, P K & Overgaard, M 2023, ' Regression models for censored time-to-event data using infinitesimal jack-knife pseudo-observations, with applications to left-truncation ', Lifetime Data Analysis, vol. 29, pp. 654–671 . https://doi.org/10.1007/s10985-023-09597-5