Technical University of Denmark Orbit Lophaven, S, Carstensen, J & Rootzén, H 2004, ' Space-time modeling of environmental monitoring data ', Environmental and Ecological Statistics, vol. 11, pp. 237-256 .
Technical University of Denmark Orbit Lophaven, S, Carstensen, J, Rootzen, H, Høg, E (ed.) & Høst, V (ed.) 2002, Methods for Estimating the Semivariogram . in E Høg & V Høst (eds), Symposium i Anvendt Statistik, Århus, 21.-23. januar 2002 . Handelshøjskolen i Århus. Institut for Informationsbehandling, pp. 128-144 .