Antanas Verikas Adas Gelzinis Kerstin Malmqvist Marija Bacauskiene Using Unlabelled Data to Train a Multilayer Perceptron. 40-49 2001 conf/icapr/2001 ICAPR http://link.springer.de/link/service/series/0558/bibs/2013/20130040.htm db/conf/icapr/icapr2001.html#VerikasGMB01