A Lyapunov approach to integral input-to-state stability of cascaded systems with external signals.

Hiroshi Ito A Lyapunov approach to integral input-to-state stability of cascaded systems with external signals. 628-633 2008 CDC http://dx.doi.org/10.1109/CDC.2008.4738632 conf/cdc/2008 db/conf/cdc/cdc2008.html#Ito08