@article{PIM_1991_N_S_49_63_a30,
     author = {Pavle Mladenovi\'c},
     title = {On {Covariance} {Of} {Spectral} {Estimates} {Of} {Stationary} {Random} {Sequence}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {239 },
     publisher = {mathdoc},
     volume = {_N_S_49},
     number = {63},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/PIM_1991_N_S_49_63_a30/}
}