@article{PORMA_2000__57_1_48608,
     author = {Swift, Randall J.},
     title = {Signal extraction for a class of nonstationary processes.},
     journal = {Portugaliae mathematica},
     pages = {49--58},
     publisher = {mathdoc},
     volume = {57},
     number = {1},
     year = {2000},
     zbl = {0953.60014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_2000__57_1_48608/}
}