1. H.E. Ascher, K.A.H. Kobbacy, and D.F. Percy , 1999 . Scheduling preventive maintenance using concomitant information. University of Salford Technical Report.
2. H.E. Ascher, K.A.H. Kobbacy, and D.F. Percy , 2000 . Applying PIM and PHM models to PM scheduling. University of Salford Technical Report.
3. Reliability