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, May 1974
Lecture Notes in Economics and Mathematical Systems, Systems Theory, 111
Lecture Notes in Economics and Mathematical Systems, Systems Theory. 111