Institution: | 1.Department of Mathematics and Statistics, Fylde College,Lancaster University,Lancaster,England;2.Department of Statistics,University of Toronto,Toronto,Canada;3.Institut de statistique,Université catholique de Louvain,Louvain-la-Neuve,Belgium;4.Departamento de Matemática para a Ciancia e Tecnologia,Universidade do Minho,Guimar?es,Portugal |