Amandine Orecchioni Nirmalie Wiratunga Stewart Massie Susan Craw k-NN Aggregation with a Stacked Email Representation. 415-429 2008 ECCBR http://dx.doi.org/10.1007/978-3-540-85502-6_28 conf/ewcbr/2008 db/conf/ewcbr/eccbr2008.html#OrecchioniWMC08