L. Bovino Giovanni Dimauro Sebastiano Impedovo Giuseppe Pirlo A. Salzo Increasing the Number of Classifiers in Multi-classifier Systems: A Complementarity-Based Analysis. 145-156 2002 conf/das/2002 Document Analysis Systems http://link.springer.de/link/service/series/0558/bibs/2423/24230145.htm db/conf/das/das2002.html#BovinoDIPS02