Autor de: Trend, seasonality and seasonal adjustment. 1988: (p.r.: professor de Econometria na London School of Economics)

http://authorities.loc.gov 1/12/09: (professor de Econometria, Departamento de Estatística e Matemáica, London School of Economics and Political Science ; d.n., rems.)

http://catalogue.bl.uk 1/12/09: (d.n., rems.)