title: Modeling non-homogeneous variance time series: An application to sulfur dioxide data.
authors.affiliation: Scientific/Technical Section Illinois Pollution Control Board, SOIC Suite 11-500 100 W. Randolph Street, 60601, Chicago, IL, USA.
authors.forename: H G
authors.initials: HG
authors.lastname: Rao
authors.forename: W R
authors.initials: WR
authors.lastname: Terry
authors.forename: A
authors.initials: A
authors.lastname: Kumar