@article{PIM_1977_N_S_22_36_a1,
     author = {Dragan Banjevi\'c},
     title = {Preventive {Replacement} {Policies} {Up} {To} {The} {First} {Failure}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {23 },
     publisher = {mathdoc},
     volume = {_N_S_22},
     number = {36},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/PIM_1977_N_S_22_36_a1/}
}