Terry Windeatt Reza Ghaderi Gholamreza Ardeshir Spectral Coefficients and Classifier Correlation. 276-285 2003 conf/mcs/2003 Multiple Classifier Systems http://link.springer.de/link/service/series/0558/bibs/2709/27090276.htm db/conf/mcs/mcs2003.html#WindeattGA03