Paper  doi  bibtex   

@article{wang_survey_2002,
	title = {A survey of maintenance policies of deteriorating systems},
	volume = {139},
	issn = {0377-2217},
	url = {http://www.sciencedirect.com/science/article/pii/S0377221701001977},
	doi = {https://doi.org/10.1016/S0377-2217(01)00197-7},
	number = {3},
	journal = {European Journal of Operational Research},
	author = {Wang, Hongzhou},
	year = {2002},
	keywords = {Maintenance, Maintenance policy, Optimisation, Reliability, Replacement},
	pages = {469 -- 489},
}