http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Variable structure systems with application to economics and biology
proceedings of the second US-Italy Seminar on Variable Structure Systems
US-Italy Seminar on Variable Structure Systems 1974 : Corvallis, Or.)
Lecture notes in economics and mathematical systems ; 111