@inbook {13815, title = {Optimal Replacement and Inspection of Stochastically Failing Equipment}, booktitle = {Studies in Applied Probability and Management Science}, year = {1962}, pages = {184-206}, publisher = {Stanford University Press}, organization = {Stanford University Press}, author = {Dale Jorgenson and R. Radner}, editor = {K. J. Arrow and S. Karlin and H. Scarf} }