TY - JOUR AU - Swift, Randall J. TI - Signal extraction for a class of nonstationary processes. JO - Portugaliae mathematica PY - 2000 SP - 49 EP - 58 VL - 57 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PORMA_2000__57_1_48608/ LA - en ID - PORMA_2000__57_1_48608 ER -