RT Conference Proceedings SR 00 A1 Ermoliev, Y.M. A1 Oortmarssen, G. van T1 On modelling and optimization of abrupt changes: Disease control processes YR 1994 FD 17-21 September T2 Proceedings of the Working Group Meeting on Modelling Noncommunicable Diseases: Methodological Issues AV Published LK https://pure.iiasa.ac.at/id/eprint/4051/