David Turner David Abercrombie James McNames W. Robert Daasch Robert Madge Isolating and Removing Sources of Variation in Test Data. 464-471 2002 conf/itc/2002 ITC http://csdl.computer.org/comp/proceedings/itc/2002/7543/00/75430464abs.htm db/conf/itc/itc2002.html#TurnerAMDM02