Anthony Coyette Baris Esen Ronny Vanhooren Wim Dobbelaere Georges G. E. Gielen Automatic generation of autonomous built-in observability structures for analog circuits. 1-6 2015 ETS https://doi.org/10.1109/ETS.2015.7138754 conf/ets/2015 db/conf/ets/ets2015.html#CoyetteEVDG15