@article{MABA_1990_4_3-4_a1,
     author = {T. Constantinescu},
     title = {Some {Aspects} of {Nonstationarity.} {II}},
     journal = {Mathematica balkanica},
     pages = {211},
     publisher = {mathdoc},
     volume = {4},
     number = {3-4},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a1/}
}