The Trend-Renewal Process for Statistical Analysis of Repairable Systems. - Bo Henry Lindqvist; Georg Elvebakk; Knut Heggland (Technometrics, 2003)

A non-parametric monotone maximum likelihood estimator of time trend for repairable system data. - Knut Heggland; Bo Henry Lindqvist (Reliab. Eng. Syst. Saf., 2007)