Koeunyi Bae James S. Thorp An Importance Sampling Application: 179 Bus WSCC System under Voltage Based Hidden Failures and Relay Misoperations. 39-46 1998 HICSS (3) http://computer.org/proceedings/hicss/8239/82390039abs.htm db/conf/hicss/hicss1998-3.html#BaeT98