%0 Journal Article %T Lifetime efficiency index model for optimal maintenance of power substation equipment based on cuckoo optimisation algorithm %A Afzali, Peyman %A Keynia, Farshid %J IET Generation, Transmission & Distribution %V 11 %N 11 %P 2787-2795 %D 2017-08-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve